I think IWB carry is a pretty personal level of comfort. Similar to shoes
Everyone is slightly different and what is agonizing to one is not noticeable to another.
I do think that thicker knives that push on various muscles and bones might have a prolonged impact on comfort. Get through the day and wake up with a pain, etc. If given the choice thin and small would be ideal. A cricket, spin, balance, etc. I wore a Dragonfly FRN like this occasionally which was pretty comfortable.
Maybe I'm just a wuss (quite possibly
) but something like the Para2 would drive me mad. Then again, two different socks do. Lol.