I honestly cannot tell any difference. At least not from the press photos. I'm happy to post close up from a few standard angles if someone with the Black/Blue would do the same.
Alternatively, I might just stop in the AD the next time I'm at metro center and do a little quick comparo under the guise of shopping. Actually, that might not be so dishonest...the BB Bronze is really starting to catch my eye. But then again...I know the two-tone look is controversial but it really calls to me!
PS. Let's hope a Pelagos GMT is coming in the future. I'd definitely go for that ahead of the Rolex GMT II Master. A titanium GMT with 70-hour reserve? Yes, please!
BTW, saw this concept posted on TRF. It's not mine and I don't know where it comes from...but imagine it in LHD dress...I certainly could. That deep-dish rehaut is tailor made for 24-hr markers, and that nice long GMT hand. Oh yeah.