I've used the "regular" Mazuri and Zoo Med Forest Tortoise Diet with success. My four eat both with equal enthusiasm.
I make this a small component of their diet (2/month) especially when they are indoors for the winter as it's a nutritionally very rich. I found when they received either processed diet 2-3 times/week their growth was far too rapid. I think this was compounded by the lettuce they were eating as well (as opposed to weeds in the summer) as grocery store produce has higher rates of protein than weeds. This is just my experience and two-cents. Take it or leave it.