First, I've read that the Mongram is better than the Revell becasue the Revell is a prototype and the Mono is from after several missions.
However I have found there are at least three versions of the kit! One, apparently later has the shadows molded into the base, you're supposed to paint them black. Another earlier version I just saw on Ebay has a moon surface base without the shadows. I'd get that one but it's started. Then I also saw on ebay a SnapTite 1/48 LEM.
These are the kits I've found. First Lunar Landing, Monogram #6872 First Lunar Landing, Monogram #5503 (1979), 10th Anniversary First Lunar Landing, Monogram #6060, Heritage Edition First Lunar Landing, Monogram #5901, Young Astronauts First Lunar Landing, Monogram #5081 (1993), 25th Anniversary Don't have the number for the SnapTite.
Any history, comments?