Ral is better positioned for the format that's shaping up, but yeah, voice is amazing. Both cards do insane things in Standard, and Ral has some dangerous potential with Stasis. Even if that doesn't go anywhere, it's a powerful interaction that'll make his price go up.
"He's legacy playable" spreading around at LGSs will cause any planeswalker's price to skyrocket, even if he actually isn't.
He also kills Voice at sorcery speed pretty efficiently, if that's going to be a problem for the new control decks. Superfriends/fog is looking pretty decent in a format where people playing Revelation have a lot of new cards -- like sire of insanity -- to play around. People are mocking Dragon's Maze for being weak on MTGS, but I have no fucking clue why. There's at least a dozen cards that'll impact standard heavily, and Ral & Voice are absolutely absurd.
I ordered no voices (didn't have money when they were 20) but Ral dipped to 20-ish on ebay, and I'm excited about playin' some FNMs.