You learn to fold hands in ring and extract the most money when you have a monster. In a donkament it is rare to have more than 25 bbs late and even if you do, there are always shorties at your table. Being 100 bbs+ deep, you learn how to play the turn and river because these 2 streets are almost non-existant in a tournament.

These are just a few differences; read Renton's guide if you haven't already - it really explains in detail some situations you will come into on ring and how to play them.