Race cranks have full radius jounals, obviously with full radius cranks, edge radius clearance has to be given to the bearings next to these full radius corners.
Billet cranks are strong and very expensive. Most aftermarket crank grinders offer upgrades that lighten these billet cranks. Supplemental machininig by a machine shop is often necessary to lighten them making prices sky high for most enthusiastics.
I been using a 440 source cranks in different applications for my customers and it has given very good results. Of course, no matter how much you pay for a crank it has more clearance and measurements to check than any other single part.