track drops don't have a flat section on top, they have a larger-radius shoulder so the bend doesn't hit your forearm when sprinting in drops. they tend to be deeper than road counterparts, and most (but not all) have a round bend vs. a sectioned or 'anatomic' bend. technically this gives you fewer hand positions than a road handlebar with aero brake levers, but you may not miss the extra ones.

most drops have less reach than most bullhorns by 2–8cm or so, especially pursuit horns like nitto's RB009 and RB019. their RB018 is fairly short reach and no drop.

fwiw, i have 40cm deda pista drops on my track pro, and 42cm deda akros bullhorns on my iro. the iro is a 53cm and is on the small side for me, so the additional reach is welcome sometimes.