Cool, SQRL is on the case. In the past I had to spend paragraph after paragraph taking down Windbane's inane anti-Wii trolling but looks like it's taken care of this time.
I will add a little bit to the discussion, it is possible for something to be both more powerful and similar to something else at the same time. Saying something is more powerful is a relative comparison between two things, saying something is similar is a relative comparison of the two and something else. So it is possible that say some benchmark is used on the Xbox, Wii, PS3, and 360. Just making up numbers let's say the Xbox had a 1,000, the Wii 1,250, the PS3 15,000, and the 360 14,000. Comparing just the Wii and the Xbox the Wii is somewhat more powerful. However comparing 1,000/1,250 to 14,000/15,000 they are also similar.
I have read, I think on IGN, that a few Gamecube games seem to have brighter colors when played on the Wii and also don't have as many frame rate issues. I've always guessed it had something to do with the Gamecube having 24MB of "faster" RAM and 16MB of "slower" RAM while when on the Wii I would guess the RAM is much closer in performance but that's just speculation on my part. I did try to test it with my GCN copy of Zelda TP and noticed there wasn't slowdown in a few situations but the conditions could have been slightly different.







