The Standard Poodle is far larger: about 25 kg (55 lb) as an adult, against 2.3 kg (5 lb) for the Toy Poodle.
Temperament
They differ most on affection (Standard Poodle: affectionate on its own terms; Toy Poodle: a lap or leaning dog) and on loyalty (Standard Poodle: bonded to its family; Toy Poodle: sticks close to its people).
Alike
Both are rated the same on independence: keen to work with you.
Neither is the better dog in general. Which suits you depends on your home, your days and the care you can give.
Breed explains only about 9% of how individual dogs differ in behaviour7. Meet the dog. A good breeder breeds for temperament as well as health, and matches each puppy's personality to the right home8,9.
Puppy growth
Reference curves · both sexes
Summary
Detail
The Standard Poodle grows to the heavier adult, about 25 kg against the Toy Poodle's 2.3 kg.
Expected weight in kilograms, both sexes: each breed's adult weight grown along the 15–30 kg band of a WALTHAM growth standard10 and the under 6.5 kg band of a WALTHAM growth standard10.