I like the look of the Pure Wand and I like that it has one end that has a 1.5" dia head.
On the other hand the Fun Wand has a similar functionality on one end, but also comes with the graduated beads on the other end. It's like two toys in one. I personally might find the 1" head a little small, but if it is being used primarily for prostrate massage then it doesn't matter so much.
To be honest, I would be happy with either.