The Casita is heavier than Scamp trailer so you need a bigger tow vehicle. Scamp is 1500 – 2000 lbs, the Casita is 2200 – 2400 lbs.
There are some other differences like:
The Casita has bigger tires available up to 15 inch. The Scamp only has 14 inch.
The Casita costs a little more.
Casita has wider beds.
Scamp has more floorpans and available wood cabinets.
The Casita has bigger refrigerator with freezer.
Casita has larger holding tanks.
A generator is an option on scamp, but not Casita
Both are made from fiberglass, and are very similar.
Compare to trailers from other companies: