I've got a uniquefire green led light under the barrel of a 22 and it really works great. Lights up well, and doesn't seem to bother the critters as much. You do have to be patient when you order one, but the price is decent.
I really like my Flir PS32. I know, you asked for a compare, but the Flir is almost bullet proof for me. I really like that alert capability, it sure shows me the coyotes.