How do the Shimano BR-7403 compare with the BR-7800? The latter seem to have a following and the "Dura Ace" is mostly out of view so you see the design of the brake instead. But, I am also looking at the Superbe hidden spring brakes too, but very pricey when they appear for sale on the bay. Considering this rebuild will be ridden into the 60s, 70s and 80s, that’s years ahead not decades past (Mr. Marchand of France finally retired at 106from racing and setting Hour Records, due to high blood pressure-isn’t it great to have a role model for the future!). So I am partial to dual pivot given the natural decline that comes with time in muscle mass, grip strength. How do the 7403 and 7800 compare? My thanks