Just got off the phone with Salomon Custy Service, and they had to ask up the chain to get an answer. How about that for strange...? Apparently, the Pro and Pro Pebax are "out-of-the-box" ready for AT binding setups. You can order "DIN" or alpine heel and toe pads that will allow them to fit an alpine binding.
The Quest 10, 12, 14s, however, are "out-of-the-box" ready to click into your alpine setups.
Multiple sources on the interwebs say that you "can" use them on alpine bindings without different pads. And...the Salomon site does not make it clear that you can use them specifically for either set up. However, Salomon made it official over the phone just now that the Pro models are AT only, unless you get the pads...which you can't simply order off their website, Backcountry's website, or anywhere else. You have to go to a local dealer who sells Salomon products, and have them special order them for you....assuming they have the current product list to order off of.
Just having the Pro as their AT boot and the rest of the Quest line as their "hybrid" alpine boot is very confusing. As a brick-and-mortar retail staff member, this is frustrating. But, at least we know. Somebody play that "The more you know" NBC jingle...