I've got a huge master system collection, complete Euro set including Les Schtroumps Autour Du Monde (Smurfs 2), almost complete US set and around 50 Brazilian Tectoy titles including Sonic Blast, Virtua Fighter Animation, Battlemaniacs, Fifa, X-men, Ren & Stimpy etc.
In the UK and France as well as other parts of Europe the master system was way more popular than the NES. As many have said, it was really Nintendo's (illegal) stranglehold on 3rd party developers that killed the master system in the US.
If most titles released for both the NES and the SMS are compared, the SMS is far superior in all areas barring sound 90% of the time. If only they'd released units with FM sound outwith Japan!
