I know Mos wagyu is probably not real wagyu, but I was quite excited to hear about a fried wagyu patty. The XL refers to the patty, as the bun is the same small Mos bun. You can select curry sauce, but I went for katsu sauce. Overall it was a good combination, but don't expect much from either the wagyu or the katsu. It's basically a typical beef patty that's fried.