Rented a Glock 43 to compare to my G36. The 36 has fed everything I've tried. Both were totally reliable, including one handed and weak hand shooting. The G43 made smaller groups.
They both recoil about the same with standard ammo. 45 ACP 230 grain have noticeably more recoil than a 185. The 43 is a lot slimmer than the 36. Might buy a 43 for summer carry.