Wraps can be anything from 8 to 12 syns depending on size. They are not listed online so I would probably just go with the bread as at leats you can be sure of the syns and I doubt you would save much by having a wrap.
By the way, be careful with the sauces - yes the sweet onion sauce is 2 syns per serving but a serving is around 20g or just over a tbsp and they usually put loads on. You could easily be talking four times that much or 8 syns just on sauce!
I'd go bread. Wraps are iffy. And you could always ask for just a little sauce then try and judge if its 20g. But even that way i would say you'd be looking at at least 2tbsp. So more like 4 syns than 2.