The difference between Shark NV502 and NV552 are the color and the accessories they come with.
Shark NV502 is red and white while the NV552 is in gold color, as for the cost, Shark NV552 seems more expensive than the NV502.
Shark NV552 vs Shark NV502
| Shark Rotator Pro Complete Lift-Away NV552 | Shark Rotator Pro | |
|---|---|---|
|  |  | |
| Color | Gold | White and Red | 
The Shark Rotator Pro NV502 comes with a Dusting Brush, Crevice Tool (info from Shark indicates it’s a 18″ crevice tool, but the info on Amazon and BBB show that it’s a 12″ crevice tool), Premium Power Brush, Car Detail Kit, Straight Suction Nozzle and Canister Caddy.
 
The Shark Rotator Pro Complete Lift-Away Vacuum NV552 includes a Dusting Brush, 18″ Crevice Tool, Premium Power Brush, Multi Angle Dusting Brush, Wide Upholstery Tool, Under Appliance Wand, Dust Away Tool with a Microfiber Pad, Canister Caddy, and an Accessory Bag.

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Do you own these 2 vacuum cleaners? If yes, please correct the info above if there’s any misinformation. Thanks.
Please compare nv502 vs 352