Hmm I see you are from Austraila, maybe checkout
www.boingonline.com and see if they can recommend any good pelleted foods in your country.
Hamsters and rabbits have very, very different diets, rabbits are herbivores so need loads of fibre and little protein but hamsters are omniovores so need far less fibre and a good bit more protein. Rabbits really don't need anymore than 12% protein whereas hamsters around 20% which is a big difference so one or other isn't going to fair well on this diet, and my bet is the rabbit.