Hairy hairless- Grows hair on the back, feet,face,head, tail and ears the length/thickness if hair varies on each dog.
The hairy hairless need their face and body shaved to achive the proper look.

True hairless- No hair on the feet or body can have litle on head and does not need shaving.

Powderpuff- Long plush hair everwhere but the face needs to be shaved with a 10 to get the desired look, ears can be shaved too.