SB vs BB who wins?

I'm going to build the best of the 2 and hook up a friend I met on here with the other 400. Any idea what the limit is one boing one out? I try to bore as little as possible and I intend on sonic testing them as soon as they get here but figured with your experience you have a good idea.
Mine is a 4.375 bore. So .033 over and a great piston selection. I have 3.91 stroke, 6.70 rods and 1.320 ch pistons.
Have them sonic tested for sure.