Which game is better, Super Mario World or Sonic 1 (Genesis)

[VAMatt]

I strongly preferred Sonic at the time, as it was new and different. I felt like it moved gaming forward much more than Mario World.

Today, I can better appreciate that, taken in and of themselves, SMW is the higher quality game.  

But, if I had to choose one to erase from history, it would have to be SMW.  Without Sonic 1 there is no Sonic.  But, Mario was already here, and would exist with or without SMW.