I have one guitar with a Dual Sound (4-wire Super Distortion) and an identical guitar with a Tone Zone. Both are installed at the bridge. If you use Tone Zone as the keyword for an Advanced Search, you should find lots of discussions on both of these pickups. I've never owned a Pearly Gates, because I've never played a SD-equipped guitar that inspired me to want to cop their sound.

I think the Tone Zone is probably closer to what you want. The Super Distortion has a thicker sound than the PG, but the Tone Zone is better at making harmonics and overtones jump out at high gain, without getting muddy. Quasi-synth tones are there for asking. The Dual Sound gets that same classic Super Distortion crunch in series connection, while giving some tasty lower-output tones in parallel mode. The Tone Zone also allows series/parallel coil connections, with its own voicing.

'Modern' heavily-processed rigs are not kind to the Super distortion. It was developed for the tube amps being used in the 70's, and that's where its happiest. The Tone Zone works well with my old tube amps too, but it was developed for the newer rigs, and I think it would be a better choice for you. Install it with 1 Megohm pots for both the Tone and Volume controls. Use a 0.022 uF cap for the Tone control, and install a 0.001 uF cap between the 'top' of the Volume pot and the wiper terminal, to prevent treble roll-off at reduced Volume settings.