I don't think either one is better for quiet practice - they are both good for that. I've had a Pathfinder for years and I had an AC4 for a couple of days before sending it back. You already know what the Pathfinder is like from this thread, and I can say that the AC4 is a very cool, good sounding, well-made amp. If you want an amp that can give you nice thick tones at low volumes, the AC4 will do nicely. I thought it sounded very good. It just wasn't very much different than amps I already have, and it didn't have much clean headroom, other wise I would have kept it.