Crap - forgot to add a comment about bindings...
SL = Burton C02s: I like a firmer binding on this board so I can really crank on it at speed and get that responsiveness.
Proto = Burton Prophecy (Re:Flex): I went with a softer binding with more flex/board feel for the Proto. I like them a lot but sometimes I miss the better responsiveness of the C02s. I think that is just personal preference and riding style.
I also personally like a more responsive binding ... I had a pair of Rome 390 BOSS on my Proto and a pair of Burton CO2 Re:Flex on my SL... but at the end of last season, I switched the CO2 onto my Proto and I like that setup better. I sold the 390s and just picked up a pair of FLOW NX2-AT that I haven't tried out yet (man... if you had asked me 5, 10 years ago if I would ever get a pair of Flows). Hopefully, I'll like them... (else they'll be going back to Backcountry.com).