A bit more boomy. More brain rattle for sure. Not enough to turn me off of the cans, especially with how comfortable the pads are.
Lately, I've found myself mostly pairing them with my xDuoo TA-20 hybrid tube amp loaded with RCA Clear Top 12AU7A. The Clear Tops are a bit treble forward, so it helps balance everything out. As is, the cans still sound great on my 789, LCX, ZDT Jr. (with Mullard 6FC7/ECC89 for power tubes), Loxjie P20 (with GE 5670W), and EarStudio ES100.