Best Cages for a Hamster

We are after the perfect cage for our Chinese hamsters, and the kids fancy a Rotastak Hamster Cage - are they suitable for Siberian hamsters only or can you keep Chinese hamsters in them? I can’t see why not really, but some of the tubing looks hard to climb and the Chinese ones are so much smaller than Siberian hamsters. I’d hate to pay out for it and then find out that they can’t climb up to the bedroom or something! Must admit it’s quite a cool little habitat - they have lots of little rooms, and tube mazes to connect them up.