Hmmmm..... wellll.... it depends on your hamster.
The Cambridge is a nice cage *but* it's no good if you have a bar chewer so that's just something to think about. The Duna Fun is harder to bar gnaw as the bars are closer together so it's harder for a hamster to stick it's nose through and have a good chew. :P
I would agree though that the Duna Fun is a little small for a Syrian hamster but you could always just get another Duna Fun if your hamster likes that cage and attach it via the tubes. You can buy plugs for the holes from
Here or
This Ferplast Toy also comes with three yellow 'stoppers' that bung up the holes on a Duna Fun.
I use my Duna Fun as an 'attachment' for my Syrian hamster - he lives in a glass tank (as he's a hyperactive serial bar gnawing hamster!) with a Duna Fun attached as you can see here:
Hope this gives you some food for thought. x