If you’ve ever seen a cat with a wavy coat and oversized ears and wondered what on earth you were looking at, you've likely met a Rex. These aren't your average house cats. The Devon Rex and Cornish Rex are the "pixies" of the feline world—mischievous, curly-coated, and incredibly people-oriented.
But don't let the similar waves fool you. These two breeds hail from different corners of England and carry entirely different genetic blueprints. Whether you're looking for a shoulder-perching "monkey" or a sleek, high-jumping acrobat, here is everything you need to know about the differences between these two curly wonders.
Breed Overview
Devon Rex Cats
Origin and History The Devon Rex story kicked off in 1960 in Devon, England. It all started with a stray's litter that featured a strange, curly-haired kitten named Kirlee. At first, people thought he was related to the Cornish Rex, but genetic testing proved Kirlee was a one-of-a-kind mutation. This recessive gene set the Devon Rex apart as its own distinct breed, eventually gaining recognition in the US by the 1970s.
Physical Characteristics
- Weight: 6–9 pounds (2.7–4 kg)
- Length: 12–16 inches (30–40 cm)
- Coat: Short, soft, and "windswept." Think rippled velvet.
- Colors & Patterns: You name it, they’ve got it.
- Eyes: Big, oval, and wide-set.
- Distinctive Features: That classic "pixie" look with massive, low-set ears.
- Lifespan: 10–15 years
- Body Type: Slender and athletic, but surprisingly sturdy.
Cornish Rex Cats
Origin and History A decade before the Devon, the Cornish Rex appeared in Cornwall, England. A barn cat named Serena birthed a curly-coated male named Kallibunker in 1950. His owner realized this wasn't just a messy coat—it was something special. By the '60s, these "velvet acrobats" were winning championships on both sides of the Atlantic.
Physical Characteristics
- Weight: 6–10 pounds (2.7–4.5 kg)
- Length: 12–16 inches (30–40 cm)
- Coat: Incredibly soft with tight, uniform "marcel waves."
- Colors & Patterns: Every color and pattern imaginable.
- Eyes: Medium to large; usually matches the coat color.
- Distinctive Features: An arched back and a tucked-up tummy, looking a bit like a feline Greyhound.
- Lifespan: 12–16 years
- Body Type: Elegant, fine-boned, and built for speed.
Understanding the Rex Mutations: A Genetic Breakdown
It’s All in the Genes
Cornish Rex Gene (Re) This dominant gene strips away the outer guard hairs, leaving only the downy undercoat. That’s why they feel like a rabbit—you’re touching the softest part of the fur, organized into those signature tight waves.
Devon Rex Gene (re) Unlike the Cornish, this gene is recessive. It messes with all three hair types (guard, awn, and down), shortening and curling them into a looser, more chaotic ripple.
The Big Secret: If you bred a Devon Rex with a Cornish Rex, you’d end up with kittens that have—wait for it—straight hair. Because the mutations live on different chromosomes, they don't "match," proving once and for all they are entirely different animals under the hood.
Temperament and Personality Face-Off
Devon Rex Personality
The Impish House Guest: Often called "monkeys in cat suits," Devons are famously mischievous. They don't just walk; they bounce. They stay kitten-like well into their senior years, always looking for a way to get into a kitchen cabinet or jump onto a high shelf.
The Shoulder Percher: These cats are obsessed with their humans. Don't be surprised if your Devon decides your shoulder is its permanent throne while you vacuum or do the dishes.
Social Butterflies: They aren't the type to hide when the doorbell rings. Most Devons are the first to greet guests, demanding head scratches from total strangers.
Cornish Rex Personality
The Olympic Gymnast: If there’s a high spot in your house, a Cornish Rex will find it. They are incredibly agile and have a vertical leap that would put most cats to shame.
The Professional Snuggler: Because their coats are so thin, they are effectively "heat-seekers." They’ll find the warmest spot in the house, which is usually tucked inside your sweater or buried deep under your duvet.
Center of Attention: They are confident, loud, and very demanding of your time. If you aren't playing with them, they’ll likely find a way to "help" with whatever you’re doing.
Coat, Grooming, and Care
Devon Rex: The "Crushed Velvet" Feel
- Grooming: Keep it simple. A quick wipe with a soft cloth is usually enough. Over-brushing can actually damage their delicate curls.
- Skin Care: They can get a bit oily, so an occasional bath is a good idea to prevent skin issues.
- Climate Control: They get chilly easily. If you’re wearing a sweater, your Devon probably needs one too.
Cornish Rex: The "Silk Ripple" Feel
- Grooming: Their hair is incredibly fragile because they lack guard hairs. Use your hands or a very soft brush—never anything harsh.
- Sensitive Skin: Like the Devon, they can get greasy around the toes and ears, so stay on top of ear cleaning.
- Indoor Safety: These cats cannot handle the cold or direct sun. They are strictly indoor companions.
Health and Lifespan
Devon Rex Realities: You’ll want to watch out for Devon Rex Myopathy, a muscle weakness disorder. It’s genetic, so only buy from breeders who provide DNA clearance for their cats. They are also prone to HCM (heart issues), so regular vet checkups are a must.
Cornish Rex Robustness: Generally, these are hardy cats. However, like many pedigrees, HCM and dental disease are the big things to watch for. Keep those teeth brushed!
Which Breed Is Right For You?
Go with a Devon Rex if:
- You want a tiny, curly-haired shadow that follows you everywhere.
- You don't mind a cat that treats your pantry like a jungle gym.
- You love the "alien-pixie" aesthetic and huge ears.
Go with a Cornish Rex if:
- You want a sleek, elegant athlete that loves to play fetch.
- You’re looking for a permanent lap warmer and bed-hog.
- You prefer the look of a tiny, velvet Greyhound.
Which one of these curly-coated characters sounds like they'd fit into your life? Just remember—once you go Rex, you never go back!
Choosing between a Devon and a Cornish Rex is like choosing between two different flavors of magic. One is an impish pixie that wants to ride on your shoulder, and the other is a literal velvet acrobat that wants to live under your covers.
The most important step isn't just picking the breed, but picking the right breeder. Make sure they’re testing for genetic health issues like Myopathy and HCM. Once you bring your curly-haired friend home, get ready—your life is about to get a whole lot more interesting (and probably a lot warmer). Which one are you leaning toward?