They are obviously made larger and more powerful for some purpose!
they are diodes used for protection. protection from the electricity generated by a turning motor in the off section of the duty cycle of the esc. at least that was the original intent of adding a schottky to our r/c circuits, some years ago. when you get down to what they do, i don't think it is illogical to think that there is a point of diminishing returns. they don't have "powers" like this guy would >>
fyi - alot of these little caps, diodes, and whatnot can be purchased for pennies on the dollar at a place like: www.digikey.com
- low esr caps, diodes, filters etc....