They're both good (I can only speak to the Bway versions) but neither is outstanding or a must see.
SLIH - has a terrific tap/chase scene, a highlight of the show
& Juliet - the better of the two shows, and will take longer to get to regional theaters since it's still on Bway. So MAYBE I give this one the slight edge.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.