This is some educated guessing but yes you are right the top amp is a 4 channel JVM head. The bottom head is definately a JCM2000 DSL100. He's running it on the "Classic" channel (clean) probably with the boost engaged. Joe was gracious to share his DSL settings on one of my previous threads where I demo'd my JB inspired rig. He also mentioned running a tubescreamer (TS808RI) on the DSL only. He's probably got a DD-3 through one of the two Marshall heads and a little reverb dialed in on the amps. He may have some chorus going too but to my ears there is no chorus on that song. I love it when Joe gets up there and gets 95% of his expensive rig's tone on everyday amps!
'67 and '74 Fender Twin Reverbs, '74 Marshall 1987 lead mkII, Metro Superlead 100. Pedals from TC Electronic, Ibanez, Dunlop, BK Butler, Electro-Harmonix, Fulltone, Maestro/Gibson, Loopmaster switching, VoodooLab, Boss. Gibson and Fender guitars, Dimarzio pickups.