The black version I saw was fixed choke. The rib is carbon fiber. And the one I saw had 1.41 kg barrel markings. Well balanced even at that weight. Don't think it was worth several $k over a standard one. Differences are far more than cosmetic.
Pufftarget you are correct, the Beretta web site doesn't give much detail regarding the differences other than
what the photos reveal. It's apparent the barrels are different. I added a photo of the standard DT 11 above to compare.