The Pass labs are a bit warmer ,but also cleaner sounding , with better headroom
and dynamics , having dedicated amp stands to is a plus ,,there are I believe 10 fuses in the JC1 monos in thePass labs far less this too explaines and different design topology designs. For that much money there are a lot of excellent products
the Coda pure class Aamps may be better still ,at $16 k retail each
but getting a decent discount brings this down their top $7k Fet preamp
is superb even against preamps 2 x their cost , Mikeat Audio Archon
is worth the call.