Can kittens in the same litter have different coat lengths?

it's possible, my twin kittens are way different. one is short haired and 9 pounds and the other is long haired and 17 pounds. but we know they have the same father because the fur pattern is the same. you may have just gotten the runt and the big one of the litter. anyway, i dont think you should worry about them looking different because it happens all the time.