Yep...I like that site. It even has how it works for each kind of livestock, the digestibility for them, etc. I've not found another one that was so complete. I'll be doing the WDC this year with just a little of the yellow sweet clover on the edges and up in the deer plot, just for funzies.
I've done the red before and it doesn't come back like the white and I expect this yellow won't come back like the white either, but it adds variety. I was surprised to know that honey bees don't utilize the red clover, so I stopped planting it because of those reasons~not drought tolerant, doesn't reseed well, not a bee attractant and has less protein than the white...and because it gets so TALL...that stuff can get 2 ft. tall!..so it didn't work in my garden pathways very well, though it might work better in a meadow.