Ah, I see. I skimmed your response and it seemed to be directed at PSap29, and I didn't see my username in the quotes anywhere.
I'm still not sure what you see as "proof." We can talk about the differences between the two games, but whether or not that stuff makes one better than the other is all opinions. Unless this whole "proof" thing is just for dramatic effect, in which case carry on.
You know, I'm not even sure I knew that Sunshine had 100-coin stars. If that's true, and if it also has 8 red coin stars and blue coins... then that is way too much coin overload. That must make up like half the shines! Maybe not, but it's certainly a significant number of them, and more than SM64 and especially Galaxy. You talk about Galaxy being repetitive, well here's Sunshine's big repetition.
Speaking of shines I didn't get, aren't there hidden shines which have zero clues as to where they are? I think I found hardly any of those either. Not fun stuff.
As for powerups, I think the thing about FLUDD is that it's like a powerup, except constant. There's no real way to lose its power, with the exception of the occasional obstacle course level where it's stolen, which are predetermined spots. Sure, technically it can run out of water, but the tank holds a hefty amount, and water is so abundant that it can easily be refilled. So even if there are powerups in other Mario games that offer some similar functionality to FLUDD's abilities, those powerups are more special because they are a lot more sparse, and they can be lost. This makes them more valuable, and it makes me play a lot more carefully. This is how I feel about things, and I'm probably not the only one.
That stuff said, one good thing to come from Sunshine is the Piantas. Those big guys are funny. They're pretty awesome in Mario baseball, where they are power players who use a tree as a bat to smack big hits. Too bad they haven't been in a Mario Kart game, that'd be neat.