You really need to keep each port of Lemmings separate. Although there are many similarities, from experience, I can tell you almost every port has its own idiosyncracies. They may be subtle but that's exactly what will come into play in a lot of these challenge solutions. Remember, even a one-pixel difference can sometimes make or break a solution.
Here are a number of differences I can think of off top of my head between the Amiga and DOS versions:
1) time runs out faster on the Amiga version compared with DOS
2) direct drop to exit doesn't work
3) nuke glitch doesn't work
4) cannot change release rate with game paused
5) I think the basher's terrain removal can reach one pixel further horizontally on the Amiga (but the logic determine when to stop bashing etc. are all identical)
6) the backstroke of the basher (when you use the trick of having the basher remove some terrain "behind" him) is distinctly different
7) the digger requires more pixels around him to continue digging. In DOS it continues as long as any 1 of the 9 pixels of terrain are present. In Amiga, I think you need at least 1 of the 7 pixels of terrain (ie. excluding the leftmos and rightmost pixels of the 9) to be present.
Also, not only do most levels have 100 lemmings instead of 80, a number of levels have stricter requirements on the Amiga compared with DOS (eg. Taxing 22, Mayhem 4, Mayhem 26), meaning requiring 100% and/or given less skills.
That said, most of the glitches on DOS Lemmings do work on the Amiga, including the sliding glitch, the "climb-through-terrain" glitch, miner glitches, Wicked 7 glitch, and steel destruction glitches.