Cornish Rex vs Siamese
A side-by-side comparison of the Cornish Rex and Siamese — temperament, exercise needs, grooming, life expectancy, and family fit.

Cornish Rex
catSiamese
cat| Cornish Rex | Siamese | |
|---|---|---|
| Species | cat | cat |
| Size | small | medium |
| Weight | 6-10 lbs (2.5-4.5 kg) | 8-12 lbs (3.5-5.5 kg) |
| Life expectancy | 11-15 years | 12-15 years |
| Energy level | high | high |
| Good with children | yes | yes |
| Apartment-friendly | yes | yes |
Temperament & personality
Cornish Rex
Active, acrobatic, and affectionate. They retain a kitten-like playfulness throughout life.
Siamese
Siamese cats are famously vocal, social, and intelligent. They form deep bonds with their owners and often follow them from room to room. They are highly active and curious, requiring plenty of mental and physical stimulation. They can be quite demanding and do not like being left alone for long periods.
Exercise & play
Cornish Rex
Very active. They need vertical space and interactive toys.
Siamese
Siamese cats are highly intelligent and require daily interactive play and mental challenges. They excel at learning tricks and playing fetch. Providing vertical space like tall cat towers and puzzle feeders will help keep them engaged and prevent boredom-related behaviors.
Living environment
Cornish Rex
Strictly indoors. They struggle to maintain body temperature in cold.
Siamese
Siamese cats thrive in active households where they receive plenty of attention. They are well-suited for apartment living provided they have sufficient enrichment and vertical space. They are social animals and are often happier when they have another feline companion.
Which is right for you?
The Cornish Rex and Siamese both make wonderful companions, but they differ on a few key dimensions that will likely decide which is right for your household.
- Cornish Rexs are a small breed; Siameses are medium. Plan food, crate, and vet costs accordingly.