+1,385,421 Until you have serviced anything, who knows? BB bearings and grease, wheel hubs, freewheel, chain, etc. I just finished a typical bike that the PO said was ready to ride. . Naturally, I tore it down to the bare frame. As we were tearing it down to the frame. Crank turned OK, not great. With the crank off, you could not turn the BB spindle. Opened it up, grease had turned into a sticky, gummy mess. Wheel bearings and HS were the same way. Ditto chain.
This is the norm on older bikes.
IF recently FULLY serviced, then you have the entire question on wheels, tires, inflation, etc.
Beyond that, one might fit you just a little better than the other.
I typically ride for exercise, so when one bike is less efficient, I just figure I am getting more exercise. I treat it as a benefit!