I've got 2 ltd Vipers with similar specs. One sounds amazing (2014 Viper 1000 deluxe, emg 57 & 66), it's thick and full sounding, articulate, clear, great to play, and the other Viper (2004 Viper 400, emg 81 & 60a) sounds like shit! (thin, gross) but has great playability. I want to know what...