which is you opinion between the two same...
which is you opinion between the two same price bindings..? Burton custom and Forum faction?
I'd go burton, I've never had an issue with their bindings and they have a better warranty just in case. Burton bindings are extremely comfortable too. Unless you're dead set on one of these two bindings check out Union's too, they are also bulletproof and very comfortable.
The Faction bindings combine both nylon and Aluminum. You get the best of both worlds. The other main difference is the toe cap. The Forum Faction has the same toecap as their higherend bindings. It never slips and never falls apart. The straps on both are pretty comparable. Both are good. You can't go wrong.