I carry both the G32 and G33 in 357 SIG, both the same size as the G23/G27. I have no problem carrying both at the same time. I also carry a G38 and G39 in 45GAP. Same size comparison as well.
I really wonder why everyone seems to have such a hard time carrying one small gun, and seem to always be looking for something even smaller and or lighter. I guess since I've been carrying for 40 yrs now, I just don't feel "normal" unless I have a primary and secondary gun. I also carry spare mags.
If you are going to make the decision to carry, then do yourself a favor and carry something that you can grip appropriately, and has the ability to stop an attacker as quickly as possible. YMMV as well as your opinions, but this has worked for me.
The G33 and G39 both have the Pearce plus 2 for a better grip as well as adding an additional round.
As always, stay safe.