Crap shoot. The fact that a soak test is announced makes it likely that 904 is the candidate but still.. the last time was a pain. I promised myself id wait too but didn't because I didn't want to redo my gsm settings. Probably not a good choice for laziness. 904 does have better battery!
Razr Maxx HD, Rooted Bionic GSM enabled, Stock Razr, Eris 2.3.5 GSB, Inc2 Froyo, 1.2Ghz Droid X Koush recovery, Rooted Fascinate, DIs, Ally, Charge.