To be honest, I thought Rockman Rockman was a better game than MHX, because it was practically a brand new MM game. It added 2 new Robot Masters, it had a great level creator, the challenge mode to unlock Overpowered Playable Blues was fun, it had Overpowered Playable Blues, and it gave you 11 characters to beat the game with. Like it or not, if offers a lot more than MHX did.
I found a good deal of the playable characters not really all that exciting to use with incredibly bad weapons to use. Well most of the characters warranted a "meh" from me, playable Vile was a hell of a different experience and I really enjoyed it compared to Megaman Megaman.
Now, I did have my fun with Megaman Megaman, don't get me wrong. I did enjoy Time Man and Oil Man's stages as they were new and instead of giving us the same stages for the other Masters, they actually redesigned them, though playing the game in "Original" mode or whatever it was was just ugh. I also found the Oil Slide or whatever it was called an absolutely terrible weapon. It just was.
I can't comment on the stage creater as I've never actually cared enough and I got the game long after its little creation boom was popular. However, I did download one awesome stage that had excellent use of Oil Man's weapon!