The main difference between the two, is the stiffness. I have the Co2's and I love them to death. They really clamp my foot to my board and it's got great, and I mean GREAT responsiveness. The only bindings stiffer than the Co2s (With Burton that is) are the C60's.
I would say the C02s are definitely more of a freeride binding than the Triads. I'll always stick with my C02s simply because I hate parks with a passion. I'm all freeride+backcountry. For all-mountain however, you may want something a little more forgiving. Just my opinion though!
Hope this helped a little!
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You can always switch up your parts aka franken binders. I wanted something that be used on a park board so I put triad highbacks on my Co2s. I may switch out the co2 straps and triad highbacks if I can find mission trays to create a park binder. DSCN0619SMALL.jpg