The correct answer is buy one (or more) of each.
Ride both (all) the bikes over time and then sell the one you like the least.
A vintage bike already has the depreciation built in. The value for the dollar can be much higher than buying a new bike. The last bike I bought cost $895.00 new in 1987, that's $1695.00 in 2010 dollars. I paid only a tiny percentage of that price. Do you really need the "features" of a new bike, if you think about it, probably not.