[cypher]

Any ham can get diabetes but as chesca said robos aren't especially prone to it like some other species but a healthy low sugar diet is always good & you could feed your robo the same as your Russian.
Robos do love to dig & burrow so give him plenty of deep substrate, in some ways they are similar to Russians, not good at climbing & prone to fall if given the opportunity so nothing too high or slippery for furry feet in his cage.
I agree with chesca about balls for robos & other dwarf species, a robo may be a bit skittish in a playpen so maybe begin with a play bin at first.