Had both at same time(along with mb which left super fast lol) ... afm still here 3-4 years later and mm left rather quickly ( 6-9 months). Both are great but I personally perfer afm code and layout. I set my games up steep and fairly brutal overall. I still have yet to rtu and have only attacked mars a few times. The code matches the games layout/difficulty perfect imo and the reason it's so great and addictive.