It's a DDJ (Custom Shop Duncan Distortion wound by Maricela Juárez) in his Custom Shop Les Paul Custom replica sig.
His USA Les Paul Standard comes with a Gibson pickup wound supposedly to resemble the Duncan Distortion. That has not been confirmed, but I also highly doubt it's a straight-up 500T. I don't think they even label them as 500T's.
The 500T is not worlds apart from a Duncan Distortion anyways. Both are bright, grindy, dirty overwound Ceramic magnet pickups. The Duncan Distortion is more overwound (16-ish K) than the 500T (15-ish K), but AFAIK, both use close the same if not the same wire gauge. The Duncan Distortion has a single oversized Ceramic magnet while the 500T has an oversized Ceramic magnet coupled with two Ceramic flankers. Tonally, I'd say they're more similar than not. I'd say the Distortion is clearer/more refined in the mids while the 500T is all around dirtier and rougher around the edges. But in the grand scheme of pickups, they're more similar between each other than to, say, an 8K Alnico PAF-type. I'd personally even say the Dunca Distortion is more similar to the 500T than it is to the Duncan Custom, for example.