I would say no. I've got the same bindings and wear the same size boot you're looking at (9.5). I ordered a S/M rome boss binding first, and when it came I adjusted everything really big and, to be fair, i could get in it but I was like "fuck this". The toe strap just barely reached.
Got the bigger ones and they fit really good. In short, I'd say you're fine.
x2. I ride 8.5 in boots and the S/M romes barely make it. I have L/XL on my other board and the fit is a he// of a lot better.