both are the same day I believe. the 25th Powder Mountain is having a free night jam just gotta buy a $15 night pass. back on topic I'd go with the Canyons.
dont go to that i went to the winterpark one last week, me and my buddies threw the fuck down , only team to land threes and sevens (you cant go off axis or cross your skis/land switch) It was a fucking drunk costume contest