So how much time would Wii U VC save. Also do you know how much the normal Japanese saves over the English?

I don't know the actual time saves for Japanese over English, but I know Japanese is quicker because you can skip a floor of the last ToS, and one of the puzzles is made a lot easier. Nobody's timed the Wii U VC as far as I know, but it probably loads faster lol.

Thanks also I do know that Wii U VC is way faster because the WR supplies beat all of my Gold's by like 20 seconds

WiiU Theoretically saves times over loads.
"How much time?"
- Beats me. I don't have a WiiU to test it :C

As for how much time does English save of Japanese in terms of Forest Temple RTA, none; maybe frames if you're playing on Japanese.
Overall, Japanese saves 6 minutes over English in a rough approximation

Thanks dude