Which snowboard should I use out of the 2 i have, they are both complete opposites..?

I would go with your board since it is waxed and sharpened. switching bindings isn't that hard to do. just know which screws go where. i do it all the time, just make sure that they are tight. but on the other side, if you don't want to ride your board im sure that the ski place will sharpen and wax your board for you (any where from 25 to 75 dollars).