I think NeoAir + foam is more versatile.
I use a NeoAir Short + GG ThinLight in temps down to freezing. In cold temps, I'd use NeoAir + thicker foam.
I'm a huge fan of carrying a light foam pad, rolled on the outside of my pack, so that I can access it all day. I use it as a sit mat on gravel, wet ground, snow, or sharp rocks - both for comfort during meals and to provide some butt insulation during cold weather. An inflatable pad (NeoAir, Exped, etc) doesn't really serve that purpose because 1) I don't want to put it on sharp rocks and 2) it's packed inside my pack, so not readily available during the day. For me, the 2 oz weight cost of the ThinLight is worth it for that purpose; the additional insulation it provides while sleeping is a bonus.
If you want an accessible closed cell foam pad anyway, independent of insulation for sleeping, then go with NeoAir+foam. In this sense, the NeoAir+foam is much more versatile than carrying one heavier inflatable pad.
Pad attached on the outside of the pack:
Jim using the ThinLight during lunch on top of a rocky peak: