ITR or CTR pistons in my b18c1?

I am thinking that before I drop the engine in I want to bump the compression up a little bit and I was wondering if someone could tell me which about what each would make my cr? I think for itr it is like 10.8:1 and for ctr it is 11.4-5:1 Is that right? Also assuming I keep my revs under control can I use the ctr pistons worry free? Thanks in advance