The mod procedure in the pictures should works for any 64-pin saturn.
As for the differences between modboards. It really looks like it's made from the same place. The only difference between the boards are the cosmetic appearance of some of the chips, and the numbers on them, and the ribbon socket can be either black or white, I had a post earlier which had a more detailed comparison between the two boards I have but it doesn't seem to be that useful.
Oh, and Norberto also had success with the gamegizmo mod.
Oh, and since bobbydavro has already put in a plug for gamegizmo, let me put in a plug as well. They're really straightforward and extremely quick, I received my board just a few days after ordering, I was suprised it came so quick. Of course... the prices there are a bit higher... ??? Ah well.