After trying SS out on Dolphin for myself, one of the main things I'll miss about playing it on Wii is seeing the brush-stroke depth of field. Unfortunately the Wii's resolution turns this into just a basic blur, with I just brush stroke "shapes". But on Dolphin you can really see the paint texture. It's a shame.
Another big positive apart from the obvious resolution increase, is the lack of colour banding. I'm noticing this a lot on the Wii.
I used the build recommended in this thread, but without anti-aliasing, and it worked great. However, even though running at 30fps, it seems so stutter quite often. Usually at an enemy encounter or something. There's also other graphic glitches, such as water rippling around the sword and some objects having a "ghosting" effect. Otherwise it looks great, but I'm still going to play on Wii, as I want to play the game cleanly with no glitches at all.