Neither. It's this one.
This is a 16x18 Brembo Radial Master. It's typically used for single disk four piston race setups such as supermoto, Honda RS125's or the like. It's a pain as you have to rig your own reservoir, brake light switch, and mirror mount so it's hardly bolt on. It's design yields a more direct pressure path and leverage or so the theory goes. I'll let you know how it works.