Reign In Blood wins fairly easily for me. Short bursts of adrenaline, done and dusted in 30 minutes leaving you wanting more. The less standout tracks are still better than then slower ones on RTL. And opener and closer, the two high points, are pretty untouchable even as much as I thoroughly love Creeping Death.

And while it was pretty much just a copy of the preceding album with the 7th and 8th tracks swapped, I still prefer Master of Puppets to Ride The Lightning.