Depends.
They used to say never go by the number. Call the converter people, tell them the setup as acurately as you can. Let them identify the t/c based on torque, hp and gearing.
I thought I was smart going to a tighter setup on the T/A T.C. in the 'cuda when I had them overhaul it.
Wrong!
There is less forgiveness in the tuning curves with a tighter converter.
It's a little bit like having a clutch the always engages a bit too soon.
As a result it was a major contributor to my long journey into timing and carburation.