The Super 3 is my go-to pickup for hard rock and metal in most of my RG guitars. Like was noted above, it's a
Super Distortion with pushed mids, rolled-off treble and slightly higher output. This pickup burns for scooped metal cuz you can bump up the treble on your amp (which a lot of higher-end amps really respond well to) but still get smooth, glassy, solos above the 12th fret without the sound becoming too shrill--cuts WAY down on pickup changes mid-song.
I'm now quickly becoming a huge fan of the Dimarzio Crunch Lab due to the flexibility of tone based on the direction the pickup is installed.
I'll try and get some Super 3 sound clips up sometime soon.
Cheers,
Race