Ok heres the best wsy to describe the differences in brake systems, the 15 brakes like a softtail -both brakes are spongier in feel, the 16 feels like a sportster tight and sensitive it takes maybe an inch of pedal on the 16 whereas the 15 tskes 4"? Or lots more, there are about 17 parts on the list, remember if I priced out a 15 it would be close to a grand as well, replacement parts are expensive, the brake calipers are the priciest at $190 and $209 each, im on a phone and it would be a pain to type in the list plus I didnt check differences between front master cylinders, I will try to get on a computer next week and type up a list, plus I need to double check it., my 15 stops good do im not too worried about changing them out, however if the disc or caliper dies on me I would be tempted to do a swap, the new brskes definitely give a better sport bike performance to the street whereas the old ones are more big cruiser bike in feel. (Wonder if that was intentional? , easier to switch to a bigger bike if brakes feel similar?)