The MEV is my favorite PRS model of all time.
I have played and/or owned/own multiple with different neck/FB wood combinations. My observations:
1) The maple/maple neck/FB combination has more high end emphasis on the attack (aKA “snap”) that accentuates the difference between the SC and HB settings. This is the most versatile option for the MEV to get the widest variety of sounds from one guitar. My favorite. Would really love one w piezo…but current PS limitations preclude (please Paul?).
2) The RW/RW combo (EIRW neck, Braz board) has a thicker lower midrange and smoother/longer sustain (aka more “throaty”). Also very nice depending on the sound you’re after, not as much range but excellent “sweet spots” when playing very clean or with heavily overdriven “singing” lead settings. Second favorite.
3) mahogany/RW…somewhere in between but not as unique/ versatile as 1 or 2. Prefer this combo with a hard tail…already covered by Paul’s guitar.
I suspect BRW neck/FB or roasted maple might be even better combos than 1 and 2 above…but haven’t been able to get my hands on one yet…will keep trying and report back.