The major difference between Shark Rocket and Navigator is the design. Shark Rocket is an upright/handheld 2 in 1 light vacuum while the Navigator is only an upright.

Shark Rocket vs Shark Navigator

	Shark Rocket	Shark Navigator
Design	Upright / Handheld	Upright
Power Source	Corded	Corded
Cord Length	From 27 feet to 32 feet, depends on the model you buy, HV300 = 27', HV301 = 30', HV302 = 30', HV302Q = 30', HV300W = 32'	30 feet
Technical Specifications	120V., 60Hz, 500 Watts, 4.2 Amps	120V., 60Hz, 1200 Watts, 10 Amps
Bagged or Bagless	Bagless	Bagless
Dust Cup Capacity	0.472 dry quarts	2.4 dry quarts, much larger than the Shark Rocket.
Brushroll Speeds	2 speeds, slow and high speeds for cleaning different surfaces	one speed
Suction Control	No no control to regulate the suction.	No
Weight	under 8 pounds much lighter than the Navigator	about 15 pounds
Dimensions	46" x 9.8" x 10.5" (H x W x D)	43.7” x 14” x 11.9”
HEPA Filter	No	No
Wall Mount	Yes	NA
Headlights	No	No
Swivel Steering	Yes	No
Manual Height Adjustment	No no way to adjust the height of the vac manually to match carpet's/rug's pile height.	No
Color	Orange and Blue	Lavender/Purple
Manual	Shark Rocket Manual Download Link from Official Site	Shark Navigator Manual Download Link from Official Site
Warranty	5 year	5 year
Cost	Shark Rocket is more expensive than the Shark Navigator.

Overall, if you want a lighter, more portable and versatile vacuum cleaner, then the Shark Rocket better fits your needs; if you need a compact upright with a larger dust cup, then go with Shark Navigator.