Commando is far easier and more fun to play than Ikari Warriors. Although I do like Ikari Warriors on the 7800 and prefer it over the NES version. Commando can hardly be compared to Ikari IMO. The controls are nice, the animation is smooth, the sound is good, etc. etc. It's always been one of my favorite games for the 7800 and one I was proud to show to friends. I never even knew about the POW camps until a few days ago, so finding out about those made it like a whole new game to me.
As for Rampage, I was very disapointed in both the 7800 and 2600 versions. I used to drool, (not literally), over this game when I was a kid looking at pictures of it in the Sears catalog. I wasn't able to find a copy for either system until the mid 90's. I felt there was no excuse for the simplistic buildings and round teddy bear characters that all look nearly identical. This game is one of the reasons I've always wanted to someday learn to program for the 7800. I'd like to make a better looking version. Hopefully someone will decide to do this because I may never get around to developing the skills. All that said, the gameplay is fine and I do prefer it over the NES version. It has all the major features, but the Master System version is FAR superior to any other home version I've played. Rampage on the Lynx is my overall farorite (even over the arcade), but I'm not counting that as a home system.