I've got the opp to buy a newer model for cheap for parts but need help bc I'm in no way an expert. Need input on how much alike or not alike are the 1995 and 2000 Acura Integras (both hatchbacks). Thanks.

 

99% of parts are identical but there are a few differences.

Off the top of my head, you have:
OBD1 vs OBD2A and associated electronic differences
Facelifted bumpers headlights and mirrors
Minor differences in how the back seat fits because later cars have a reinforcement beam under the seat
Cable vs electronic rear hatch release
And other stuff that I don't remember.