Our verdict
Both rake waste into disposable crystal trays. Pick the Classic for the lower price; pick the Pro if you want its health counter to track how often your cat uses the box.
The central trade-off
Health counter. The Pro's motion sensors count visits; the Classic has none.
Trays. Both use the same ScoopFree crystal trays.
Side by side
| Specification | PetSafe ScoopFree Crystal Classic | PetSafe ScoopFree Crystal Pro |
|---|---|---|
| Cats (maker) | Not stated by the maker | Not stated by the maker |
| Cat weight (maker) | Not stated by the maker | Not stated by the maker |
| Litter (maker) | Crystal litter | Crystal litter |
| Waste bin lasts (maker) | Not stated by the maker | Not stated by the maker |
| Noise (maker) | Not stated by the maker | Not stated by the maker |
| Dimensions | 27.6"L x 19.1"W x 6.2"H | 27.6"L x 19.1"W x 6.2"H |
| Weight | 12.3 pounds | 13.3 pounds |
| Warranty | 1 Year Limited Warranty | 1 Year Limited Warranty |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.