How do you tell the difference between crabapples and apples? I moved to my property 2 years ago. There are two apple trees and what I have always assumed were two crabapples. One I am sure is a crabapple. The other I am beginning to wonder about. The apples are quite small, about 4 cm. on average. The apples actually taste quite good. I usually make crabapple jelly out of them, but today I made applesauce and it turned out quite good. What is the difference?