Erm - any particular reason you're only considering these two? They seem to be at opposite ends of the spectrum, both aesthetically and functionally. Maybe something in between, like a NR? Or even an older Shimano 600? Decent performance, plenty of vintage looks.

BTW, IMHO a modern ramped-cog freewheel will make any derailleur, especially a vintage one, shift vastly better, which nearly eliminates functionality considerations.