Quick sizing question. I’m riding a 2012 S5 and I think I’m going to pick up a 2018 R3 that is on closeout.

I have a pretty aggressive position with the s5 it’s a 56 and it’s got a 120 stem on it slammed. It looks like the reach on the s5 is right in between the reach on the 56 and 58 r3 so either should work but want to see what people thought. There is a pretty dramatic stack difference from the s5 to the 58 r3

Should I just go with the same size as the s5? Anyone have both and have a recommendation?