I am honestly going to say this without reservation, KTmech all the way all day and on Sunday.
Holy hell that thing is comfy with the TRL-1 and optic, HAD issues with other pistols and holsters in the same ride configuration of being straight up and down but the KT rides lower and is comfy. I thought the slight curve would be digging into my hip but NOPE.
LOVE the protection of the of the mag release the KT has.