My Brompton has a pretty low BB , so Its an easy comfortable thing to stop and put a foot down.. perfectly suited for purpose ..

Drop is relative to the Wheel Radius , with a Tire on It , what are those Numbers ?

axis difference between centers of hub & BB but wheel size determines how close to the ground the BB is ..

So doing a 27" ->650b conversion also moves the BB down

and the Crank arm choice also lets the saddle height be lower with a Longer arm, & higher with a shorter.

Your question is oversimplified .. flip a coin.