If you are deciding between Shark Navigator Pet Pro Zero-M Upright Vacuum ZU60/ZU62 and Shark Rotator Powered Lift-Away TruePet Vacuum NV752 (or NV750,NV751,NV753,etc.), the comparison info below may help you purchase the right one.

In fact, these two Shark vacuum series are quite different. The NV752 is from the Rotator series while the ZU60/ZU62 are from the Navigator series. The main difference between them are as it follows:

Zero-M Technology (Self-Cleaning Brushroll)
The ZU62 is a newer model, equipped with the Zero-M Technology. According to Shark, this new technology helps remove short and long, human and pet hair from the brushroll. How does it work? There is a bristle guard and comb that work together to separate hair from the brushroll and send it straight to the dust cup.
Whereas the NV752 launched before the Shark applied the Zero-M Technology, so it does have this self cleaning brushroll design.
If you want to try the Zero-M nozzle design, then buy the ZU62.

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Dust Cup Capacity
The ZU62 has a much larger bin. Its dust cup holds up to 2.8 dry quarts versus 1.5 dry quarts on the NV752. With a bigger dust cup, the frequency of emptying will be lower. This is a good feature when cleaning large house.
If you prefer a big dust chamber, ZU62 fits your needs better.

Versatility:
NV752 is more versatile, it features the Powered Lift-Away which allows you to detach the pod from the vacuum and you still can use the motorized tools.
This is pretty useful when you want to vacuum underneath those low profile furniture. For a normal upright vacuum, such as the ZU60/ZU62, without this feature, such work cannot be done unless you move the furniture.
The lift away feature is also convenient for cleaning high and low areas around your house.

Headlights
The NV752 has LED headlights on the handle and floor nozzle to help reveal hidden debris and clean dark spots. While the ZU62 does not have any headlights.

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Control Button Location
The NV752 On/Off button and Surface Selector are placed on the handle for quick reach, while the ZU62 control switch is located at the top of the pod, you may have to bending over to turn on/off or change surface setting.

Brush On/Off Control
When you switch the floor selector to Hard Floor setting, the brush roller of the NV752 will be shut down whereas the ZU62 brushroll keeps spinning.
So, if you want a suction only mode to vacuum hard floors, buy the NV752 Rotator Powered Lift-Away.

Surface Selector:
The NV752 has 3 settings: Thick Carpet/Area Rug, Carpet/Low Pile and Hard Floor.
While the ZU62 has. 2 settings: Carpet and Hard Floor.

Suction Control
The ZU62 has a suction control collar that allows you to release suction when needed.

Whereas the NV752 does not have such suction adjuster. It only provides two suction levels. When choosing the Thick Carpet/Area Rug setting, it provides low suction, where setting to Carpet/Low Pile and Hard Floor, it provides high suction.
If you want one with suction adjustor that allows user to reduce suction power to vacuum like area rugs, curtains,etc., just pick the ZU62.

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Hose Length
The ZU62 has a much longer hose.

Attachments
There is also difference between the attachments included, but accessories can be bought separately if you want.
As for the ZU62 and Rotator True Pet NV752:
ZU62 comes with a Duster Crevice Tool, an Upholstery Tool, and a Dusting Brush.
NV752 comes with a Crevice Tool, an Upholstery Tool, and a
TruePet Mini Motorized Brush(or Pet Power Brush which is air driven). (Old version used to include a hard floor attachment and a caddy for canister function, but they are no longer included anymore.)
Please note that attachments may vary from time to time, and different retailers may offer different accessories with the same model, always check it before buying. Buy from retailers that you can easily return the item is a good option if you are not sure what are included.

Weight:
The NV752 is a bit heavier.
The NV752 weighs 16.7 pounds whereas the ZU62 weights 16 pounds.

Dimensions:
Rotator Powered Lift-Away: 13.2 L X 11.9 W X 45 H
Navigator Pet Pro with Zero-M: 9.8 L X 11.9 W X 45.2 H

Similarities:

• Cord Length:
  The Rotator Powered Lift-Away series used to have a 30-foot power cord. But, according to recent user reviews, the Rotator Powered Lift-Away is now equipped with a shorter cable which is 25-foot in length.
  The ZU62 have a 25-foot cord.
• Power Specifications:
  120V,60Hz,1150W,9.5A
• Cleaning Brushroll
  The brushroll cover is at the bottom of the nozzle, the brushroll is not removable. When cleaning the brushroll, you flip over the nozzle to get access to the roller to clear away anything wrapped around, such as string, hair, and carpet fiber.
• Anti Allergen Complete Seal Technology plus HEPA filter to lock in 99.9 percent of allergens and dust inside the vacuum, and expel cleaner air. For people who suffer from allergy and asthma, this feature is a plus.
• Both feature swivel steering.

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Read Manuals to Learn More:
Rotator Powered Lift-Away Manual:
https://m.sharkclean.com/include/pdf/manual-nv650.pdf
Shark Navigator Pet Pro Upright Vacuum with Self-Cleaning Brushroll Manual:
https://www.sharkclean.com/include/pdf/manual-zu60.pdf