I would guess about the same; I didn't have two similar ones to compare. The mips might be a bit slower though. I had the sense that the limitation was really L1 thrashing of code space, so the ARM being a bit denser might help. It would also help if the SOC had a smaller latency to memory as well - don't know what this one has.

Bear in mind that it's probably a packet rate rather than a bit rate limitation. That really bit us in our application because we were trying to run many lines of voip, which means lots of small packets. - YMMV.