For park and nightlife CO wins. I have done the stay in Denver and ride the resorts and it is silly how long that drive is. It depends what you want good park or maybe steeper terrain? Brighton isn't all that steep, but it has its gems for sure. Snowbird is the steepest place in UT by far but if it hasn't snowed recently it isn't nearly as much fun. Who likes ice? PC and Brighton aren't close as the car drives but right next to one another as the bird flys. They are probably an hour or more pending on weather from PC to Brighton and vice versa.