Can Russian Tortoises live off of a high quality tortoise pellet diet?

I am an expert in turtles and a little with certain breeds of tortoise so, being the one that usually answers these kinds of questions on here, I feel a bit out of place. I have had my sulfate tortoise for a few years now and, for convenience, he has lived quite happily and heathily off of the most expensive RepCal tortoise pellet diet I could find. But as he is now quite large, I am moving him to an outdoor pen, because quite frankly, my room is simply too small for him now. (It's sad my room is too small for him yet I live in it >.< lol!) Since if anyone knows anything about tortoises Egytians were out of the question because I'm not willing to shell out (no pun intended) $1,000 for the world's smallest and rarest tortoise. So I took the less painful route and put out a little over $200 for the next best thing - a Russian. He'll be overnighted tonight and I have everything ready because of all my supplies from my other chelonians except for the diet. I did some digging and apparently Russians are grazers (like my Sulcata) and no sites mention being able to use the same pellet food or not. Only pages and pages about romaine. So I was hoping, as in the case of my Sulcata, that RepCal would work as well as I think my Acme Supercard expired. XD So please let me know what the easiest diet would be if not pellet. But if at all possible I would like to rely on pellet as I do with my Sulcata.