not really. My way of thinking is this...
You tend to gravitate towards specific genres. If you like RHPS, you're more than likely going to enjoy Sweeney Todd and Little Shop.
So, there's no real comparison there. They are both musicals aimed at people with specific tastes and sense of humor.
But. Comparing Grease and RHPS..that not only compares two completely different musicals. It also compares genres. I suppose it's actually testing what genre people lean more towards. Dark humor or light, airy fun.