Wood,
I just unloaded both and compared them side by side to get an idea. I gripped each so the frames were aligned with my forearm bones. I was able to get slightly more trigger finger onto the S&W versus the Ruger. Not much, but a little bit more. I have no doubt that if you switched grips from the VZs that come on the 432 UC to something smaller, that you could get a good bit more trigger finger onto the trigger if that was your goal.
I have size XL hands BTW.
On another note. Since it finally got dark, I took a couple pics of the front sight in a semi dark room. It really "Pops". It is a very bright front sight. No question about seeing it.
It is hard to capture with a cell phone but here are a couple pics.
https://i.imgur.com/MmXSU61l.jpg
https://i.imgur.com/Vpn5vfxl.jpg
Its funny in that the room was MUCH darker than the pics show and the camera took a long time to take the pic. It looks like the gun is bent in the photo.