I've been to both, and Boulder's a LOT cleaner and safer. And if you think these are stoner towns, you need to visit Santa Cruz, CA, home of the UCSC "Banana Slugs"!
"Somehow it reminds me of Berkeley, California. Simply walk around Berkeley and you can smell pot everywhere."
Lots of old Berkeley hippies wound up in Boulder and Ward Colorado. I guess that's where their buses broke down. Only the tough hippies live in Ward being that it is 8000' ft. and gets a mite chilly in the winter.