Are O'fishL and Futures Sidebites exchangeable on Longboards?

I have a longboard I need new sidebites. Came with beaten O’FishL . I tried a pair of Pro-Teck Futures I want to put in and they are really close. The front catches a little on the Futures and doesn’t push down, but it goes down if I put it in first, then the back doesn’t go down. There must be some type of taper involved. It is so cold in my garage now I don’t want to force it while everything is so brittle. I was going to sand down the front a little to make them fit.

Are these suppose to be interchangeable, or did I get lucky and I can make them work?

no