Is there any advantage to having GC games in a particular format (DiscEX, GCReEx etc) and running them via DM USB or do they all give the same performance?
Are you using PAL or NTSC versions? There are video problems with the PAL version of TP that aren't widely documented. If you have them try playing both the PAL and NTSC versions of TP on the Wii in progressive scan and you will notice that the NTSC version looks significantly better.
Use your wii in 4:3 and compare both games, you'll see that he cubes picture is far more defined.gamecube version runs in 480p, 4:3
Wii version 480p. 16:9
They look the same to me outside of the wii version having widescreen support.
Are you using PAL or NTSC versions? There are video problems with the PAL version of TP that aren't widely documented. If you have them try playing both the PAL and NTSC versions of TP on the Wii in progressive scan and you will notice that the NTSC version looks significantly better.