I carry an issued M18; I'd opt for the X-Carry. Just my opinion. I prefer my G19.5 but it's not a bad weapon.
I actually had a hard time choosing between a P365XL and the X-Carry. Ended up getting a P365XL just due to the size and I didn't have any interest in dealing with adapters for an optic as I didn't want the DPP.
They're good weapons, but I don't absolutely love it..that said, with it being issued I can't really make it mine. I'd probably like it more if I could change a few things.
Edit: Also, I don't find it difficult to conceal AIWB w/claw. Not as easy as the G19, but it's not bad. Probably the upper end of what I would consider concealable with normal clothes though.