Shark HV322 vs HV370 vs HV371 vs Hv372 is there any difference between them?
These Shark Rocket Pro corded stick vacuum cleaners are almost the same except for the color and what tools included.

The HV322 is Burgundy/Grey, HV370 is Comet Red, HV371 HV372 are Fuchsia.

The Hv322 comes with a Duster Crevice Tool and a Pet Multi Tool, some packages may include a Storage Tool Clip;
the HV370 comes with a Pet Crevice Tool and a Pet Multi Tool;
the HV371 comes with a a Crevice Tool, an Upholstery Tool, an Anti-Allergen Dust Brush;
the HV372 comes with a Pet Crevice Tool, an Upholstery Tool, and a Home & Car Detail Kit for cleaning hard to reach and delicate areas in your car and home.

Some main features they have:
can be used as a stick or a handheld vacuum;
LED headlights on the nozzle and hand unit;
swivel steering;
handheld vacuum can be hanged from the base of the wand;
fungertip control;
removable dust cup for quick emptying.

For more info, read HV322, HV370, HV371, HV372 comparison table below:

	Shark Rocket DeluxePro HV322	Shark Rocket Pro Corded Stick Vacuum Cleaner HV370	Shark Rocket Pro DLX Corded Stick Vacuum Cleaner HV371	Shark Rocket Pro Plus Corded Stick Vacuum Cleaner HV372
Model	HV322	HV370	HV371	HV372
Design	Stick and Handheld	Stick and Handheld	Stick and Handheld	Stick and Handheld
Bagged or Bagless	Bagless	Bagless	Bagless	Bagless
Transparent Bin	Yes	Yes	Yes	Yes
Bin Capacity	0.68-quart	0.68-quart	0.68-quart	0.68-quart
Power Source	Corded	Corded	Corded	Corded
Cord Length	25-foot	25-foot	25-foot	25-foot
Power	120V, 60Hz, 500 Watts	120V, 60Hz, 500 Watts	120V, 60Hz, 500 Watts	120V, 60Hz, 500 Watts
Amps	4.2 amps	4.2 amps	4.2 amps	4.2 amps
Motorized Brushroll	Yes	Yes	Yes	Yes
Brushroll On/Off	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.
Self-Cleaning Brushroll	No	No	No	No
DuoClean	No	No	No	No
Powerfins	No	No	No	No
Washable Filters	Yes	Yes	Yes	Yes
HEPA Filter	No	No	No	No
LED lights	Yes on floor nozzle and hand vac.	Yes on floor nozzle and hand vac.	Yes on floor nozzle and hand vac.	Yes on floor nozzle and hand vac.
Wall Mount	No	No	No	No
Anti-Allergen Complete Seal Technology	No	No	No	No
Attachments	a Duster Crevice Tool, a Pet Multi Tool	a Pet Crevice Tool, a Pet Multi Tool	a Crevice Tool, an Upholstery Tool, an Anti-Allergen Dust Brush	a Pet Crevice Tool, an Upholstery Tool, Home & Car Detail Kit for cleaning car and home
Tool Clip	Some packages include, some do not	No	No	No
Cleaning Wand	Yes	Yes	Yes	Yes
Telescopic Wand	No	No	No	No
Speed options	2 Speed Brushroll	2 Speed Brushroll	2 Speed Brushroll	2 Speed Brushroll
Advanced Swivel Steering	Yes	Yes	Yes	Yes
Color	Burgundy/Silver	Comet Red	Fuchsia	Fuchsia
Self-propelled	No	No	No	No
Full Bin Indicator	No	No	No	No
Surface Cleaning Types	Carpet, Bare Floors	Carpet, Bare Floors	Carpet, Bare Floors	Carpet, Bare Floors
Warranty	5 year limited warranty	5 year limited warranty	5 year limited warranty	5 year limited warranty
Manual	https://www.sharkclean.com/include/pdf/manual-hv320.pdf	https://support.sharkclean.com/hc/en-us/article_attachments/4801214906908	http://www.sharkclean.com/include/pdf/manual-hv371.pdf	http://www.sharkclean.com/include/pdf/manual-hv371.pdf
Dimensions	47.5" high x 10.25" wide x 13" deep	48.43 x 14.57 x 10.24 inches	48.43 x 14.57 x 10.24 inches	48.43 x 14.57 x 10.24 inches

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Let’s compare and find the difference between Shark HV300 series and HV320 series below.

The Shark Rocket HV320 series HV321 and HV322 are a little different from the Shark Rocket regular model HV300 series (HV300, HV301, HV301, HV300W, etc.)
According to Shark, the HV321, HV322 use superior carpet and bare floor cleaning that cleans better than the HV300 series.

Shark HV300 vs HV320
images from manufacturer

Here are some key difference between these Shark corded stick and handheld two in one vacuum cleaners:

LED Lights.

The Shark Rocket DeluxePro HV321, HV322 and Shark Rocket HV343AMZ have LED lights on the floor nozzle as well as hand unit, whereas the HV300 series, such as HV302, do not have any lights to illuminate dark spots.

Dust Cup Capacity
Another big difference is that the Shark HV320 series and the HV343Amz are equipped with larger dust cup that is 2X the capacity of that on the HV300 series.

Brushroll
The HV343AMZ features Self-Cleaning Brushroll which reduces hair tangled issues, while the Shark HV300 series and HV320 series do not use the self cleaning brushroll.

Color
The HV302 is Orange/Grey, the HV322 is Burgundy/Grey, the HV343AMZ is Blue/Grey.

Accessories
The included accessories vary from time to time, even for the same model. For example, the HV322 used to come with a bunch of tools: a Crevice Tool, Dusting Brush, Pet/Upholstery Tool, Hard Floor Genie with microfiber pad, on-board storage clip, TruePet Motorized Brush, Accessory Bag, and Wall Mount. But now, it may just comes with a Pet Multi-Tool and a Duster Crevice Tool. No tool clip for onboard tool storage, no wall mount for convenient storage, no accessory bag for keeping all the attachments in one place.

So, always check the “Includes” that printed on the box to make sure what tools are included.

	Shark Rocket HV302	Shark Rocket DeluxePro HV322	Shark HV343AMZ Rocket Corded Stick Vacuum
Model	HV302	HV322	HV343AMZ
Design	Stick and Handheld	Stick and Handheld	Stick and Handheld
Bagged or Bagless	Bagless	Bagless	Bagless
Transparent Bin	Yes	Yes	Yes
Bin Capacity	0.31-quart	0.68-quart	0.68-quart
Power Source	Corded	Corded	Corded
Cord Length	25-foot	25-foot	25-foot
Power	120V, 60Hz, 500 Watts	120V, 60Hz, 500 Watts	120V, 60Hz, 500 Watts
Amps	4.2 amps	4.2 amps	4.2 amps
Motorized Brushroll	Yes	Yes	Yes
Brushroll On/Off	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.	No Brush roll will always spin, but spin slowly when set to clean bare floor and area rug.
Self-Cleaning Brushroll	No	No	Yes
DuoClean	No	No	No
Powerfins	No	No	No
Washable Filters	Yes	Yes	Yes
HEPA Filter	No	No	No
LED lights	No	Yes on floor nozzle and hand vac.	Yes on floor nozzle and hand vac.
Wall Mount	No	No	No
Anti-Allergen Complete Seal Technology	No	No	No
Attachments	a Crevice Tool, a Pet Multi-Tool, a Precision Duster	a Duster Crevice Tool, a Pet Multi Tool	a Crevice Tool, an Upholstery Tool
Tool Clip	No	Some packages include, some do not	No
Cleaning Wand	Yes	Yes	Yes
Telescopic Wand	No	No	No
Speed options	2 Speed Brushroll	2 Speed Brushroll	2 Speed Brushroll
Advanced Swivel Steering	Yes	Yes	Yes
Color	Orange	Burgundy/Silver	Blue/Silver
Self-propelled	No	No	No
Full Bin Indicator	No	No	No
Surface Cleaning Types	Carpet, Bare Floors	Carpet, Bare Floors	Carpet, Bare Floors
Warranty	5 year limited warranty	5 year limited warranty	5 year limited warranty
Manual	https://www.sharkclean.com/include/pdf/manual-hv300.pdf	https://www.sharkclean.com/include/pdf/manual-hv320.pdf	https://www.sharkclean.com/include/pdf/manual-hv343amz.pdf
Dimensions	46" high x 9.8" wide x 10.5" deep	47.5" high x 10.25" wide x 13" deep	47.3 x 13.4 x 10.24 inches

To add more difference between Shark HV300 and HV320 series, you can reply below.