The image difference between earlier Wiis and later Wiis is pretty slight.
Personally I’m really happy with how mine looks out via component to an OSSC set to use upsample2x to 960p with very faint scanlines.
I don’t have great screenshots on hand but this is from a few months ago.
I don’t want to start a holy war but I think that Wii and 480 native consoles actually look better output at their original res than they do upres’d in emulators. A lot of effects are designed around low res and look right that way, but fall apart at higher resolution