Bromptosaurus does look like the BB is going to be 2" higher.. bumping from 16 to a 20" wheel ..
Ending the putting a foot down at stop signs, without getting off the saddle ,
which is a habit I had to develop with my Bike Friday pocket Llama,
which I also must put a foot on the raised curb to stop without shifting off the saddle to put a foot down..
(Now BiFri has redesigned their 20" wheel frames to both be lower BB ..)