Obviously, the life-size R2-D2 unit looks more realistic than the smaller, plastic custom droids available in the same shopping area. It would fit comfortably in a Star Wars fan collection, no doubt.
We’ll have to wait and see how different they are in The Last Jedi, but at least as far as Sphero’s droids are concerned, the BB-9E is functionally identical to the BB-8 in most respects. It has the ...