Having shot the 43, 43X, 48, Gen 5 19, P365, and P365XL side by side, I have a lot of thoughts here, but I'd rank the guns in terms of how comfortable they were to shoot/control in this order:
- G19
- P365XL
- G48
- P365
- 43X
- 43
A couple notes: The G19 being the baseline for all things, the P365XL is a close second in terms of being able to shoot it well with one caveat: the P365XL frame is very thin by comparison; there is more than enough length to the grip, but it isn't very wide around. Even for those with medium-sized hands, you might feel like there isn't enough frame width for your hands. That being said, recoil impulse isn't decidedly snappy and it is quite controllable. The G48 suffers from the same issue as the P365XL, but felt much more snappy by comparison. The P365 shot well for its size, but the actual grip module was a bit too short for my hands. I wrote off the 43X and the 43 for my purposes as soon as I compared them directly to a P365/XL; it's not that they are bad pistols by any means, but it's rather that the P365/XL are that much better to shoot.
I do think that the Gen 5 Glocks are an improvement over the Gen 4s in terms of ergonomics, and the stock triggers appear to have a more percepatible "wall" with a cleaner break than previous generations did.
If you want to carry something smaller than a G19 but don't want to give up capability, the P365XL is a really good choice, and conceals very comfortably.