I received this hydrangea years ago from a friend. It was a rooted cutting when she gave it to me. It is a mophead, first opens white then changes to pinks and purples (often on the same flower), stems are red along with the veins down most of the leaves. The bush tends to grow more upright in habit, instead of like a round bush like Nikko.
It is just coming into bloom now in PA.
Here is a link that might be useful: Google + album