They serve different purposes. U-C-O-N-N is for when the opponent calls a timeout during a great basketball run or a TD in football. Option 2 is more of a wake up call or a greeting. If you see a stranger rocking gear in an unexpected place you don’t start spelling out. You go UConnnnn and usually get a Huskiesssss.
This. The classic is the best but needs to be in the right situation. Other one can be started by anybody in any situation.