I'm sure if you have tuftyfluff hams they will be fabulous
I'm glad your looking to get a pair, most people are put off nowadays, but I think its best to keep them in pairs when possible. Although theres no real difference between species.
If you can't decide between WW's and robos then campbells might be a good option. As they can be quite hyper like robos, but bigger and easier to handle like WW's. (and of course all the adorable colourations to choose from
)
Best of luck in your search x