I have both Snow Queen and Ruby Slippers Oakleaf Hydrangeas. I can definitively say that Ruby Slippers has a much better form than Snow Queen Oakleaf Hydrangea. The form is tidy, dense, and compact, and the flowers rest nicely right on top of the foliage. It's also tough as my roofers dumped a pile of old roof decking and shingles on top of one of my Ruby Slippers Oakleaf Hydrangeas and broke several branches, but it is bouncing right back.