FWIW, I have had the 500T and the Duncan Distortion in the same two guitars at one point. I found the Distortion fatter and the 500T more agressive and tighter. I find the Duncan Distortion is more like what you'd expect from a JB with a Ceramic magnet, regardles if it is or it's not the same wind. The DD has fatter low mids and is raspy, but not as raspy as the 500T. The 500T is mid-forward, but it's not as mid-forward as the Distortion. The 500T is also slightly hotter.
Then again, I'm not sure if they've decidedly changed recipee for the 500T at some point or it has evolved over time. I keep reading reviews that mention the 500T is fat, and mine isn't. But mine is from 2022.