Thanks! I was the second person to do it in MM9, and had my revenge this time. I also beat it a fifth time earlier, only to realize there is no equivalent "Gamer's Day" achievement for doing so. Ohhhhh well. : ) Scored a time of about 41 minutes. Someone already has a 30 minute time. Crazy.
I really think it's a great game, and I dare say it's on the level of 9. It's just about every bit as well designed, except for some minor things here and there, but 9 had some of those too. People are really complaining about the difficulty of some sections -- namely Strike Man's goalie boss and the sandstorms in Commando Man.
I figured out how to beat the goalie boss unscathed with just the Mega Buster, and might as well spread the word (still tagged for those who want to figure it on their own):
Stay in the middle and watch his eyes. They glance over towards where the ball will come from. Run in that direction until the ball clears your head, then run back to the other side to jump around onto the opposite side of the hand.
This is important, as the hand has to be as far out as it can go to block the ball from going to the other side. If it's not, it'll likely bounce and hit you.
Once you're on the hand, one full barrage of Mega Buster should do him in. Repeat for the second form, only the electric volts coming out of the goal will require you to do this twice, maybe three times.
As for the sandstorms, the ones that go from right-to-left can be a pain, but you're never without a safe place to wait it out. And I just confirmed what I thought about the left-to-right storms: you can actually ride them out if you jump carefully. It's especially useful on the final one, you just have to be careful to avoid the Mets and stay ahead of the storm so you can see where you're going. It's pretty fun, and one of those well-designed aspects that's difficult but rewarding, and totally optional.
The only thing I feel is different this time around is that MM9 had a lot of hype and impact. This one doesn't. No way to avoid that though. You mention the ending of 9 being better, and I agree -- but I would also say it just made sense, as being the first game in the series in a long time it was a nice nostalgic piece of fanservice that wouldn't have worked in any other context.
There's a lot to the game, with the challenges and Proto Man right off the bat. If someone were choosing between 9 and 10, I'd recommend 10 easily. I want to play it more, only the throbbing of my eyes is telling me otherwise!