To be honest, if he likes the Harry Hamster you may be best sticking with that and putting out some seeds as extras/supplements. It's the only one that has the right level of protein. The others all need the protein supplementing.
I put out a few linseeds and a few hempseeds each day on a separate little dish - very nutririous and thye love them!
I do use the Bunny one (the basic one, not the expert one though) for our robo and he does like it but he doesn't eat much of it
And it doesn't have enough protein so you need to supplement the protein then. A bit of carrot in that quantity won't do any harm.
https://www.zooplus.co.uk/shop/small...er_food/280189