I'm thinking the same. I'm leaning towards Black Bay but want the deployant clasp as well as the bracelet.
heres some help
They both look great. Are the markers on your Pelagos off?
Ryan offers the BB with leather strap and bracelet. The strap has the clasp on it. Not sure about the quality.
I think getting both and selling the one you like the least is the way to go. For me the BB is almost the perfect watch. Double check your pip/pearl when you get it though to make sure it is glued in strongly. I am not the only one that has lost one.