You do realise the size is almost identical to the regular Pro? The size difference is only really down to the crown gaurds. The actual bezel size is the same.
I haven't ever tried one on but my understanding is it does wear a tiny bit smaller, but appears to wear slightly higher so you should really try both on if you can.
For what it's worth I don't think even the Pro looks 42mm on the wrist.
EDIT, not my image, just grabbed from Google to help illustrate...