* Size: Greyhounds are typically larger than whippets, with males standing 28-30 inches tall at the shoulder and weighing 65-70 pounds. Females are slightly smaller, standing 26-28 inches tall and weighing 55-60 pounds. Whippets are smaller, with males standing 18-21 inches tall at the shoulder and weighing 25-35 pounds. Females are slightly smaller, standing 17-19 inches tall and weighing 20-25 pounds.
* Build: Greyhounds are built for speed, with long, slender bodies and powerful legs. Whippets are also slender, but they are not as tall as greyhounds. They have shorter legs and a more muscular build, which makes them better suited for agility work.
* Temperament: Greyhounds are gentle, affectionate dogs that make great family pets. They are also very intelligent and easy to train. Whippets are also friendly and affectionate, but they can be a bit more high-strung than greyhounds. They are also very active and require a lot of exercise.
In general, greyhounds are a good choice for people who want a large, gentle dog that makes a great family pet. Whippets are a good choice for people who want a smaller, active dog that is well-suited for agility work.