Used tractors I assume since you are looking at the 5525. Both are good tractors. What is your horsepower requirement? 2 or 4 wheel drive? Have you driven both? The control layouts are different. The JX series were/ are no frills basic tractors. They sit up very high unless you look at the C series.
I would look for wet clutch tractor, i.e. one with a powershuttle transmission. A powershift transmission would of course be nice, but I don't know if Case sold one. The New Hollands TL series had them as an option. The Deere is an excellent tractor and you can't go wrong with it. I think it has the nicer cab of the two. Either one will be a fine tractor.
Consider where you will get parts and service because that will likely be more important than which tractor you get in this case. Do you like the nearest dealer? Also, what kind of bargain you get and how many hours the tractor has may make it quite clear.
Good luck!