The .45acp will have better terminal balistics than the 9mm, but I would take the G26 over the G36 because I don't like the way the G36 feels in my hand. Simple as that.
I believe Corbon 115 gr +P+ 1350 fps ammo in the G26 will deliver superior performance. The Corbon ammo gives the added benefit in low light of nearly zero flash.
I have the Glock 26 with mepro night sights. i have been all kinds of happy with it. I use wichester hollow points and have noticed that they create a hole just as big as my .45s do. it is also very accurate and controllable in my hands. I doubt if this answers your question. just passing along more opinions