I can't help with the specific question because I've never heard either manufacturer's amplifier offerings.
I can state that high build quality does not = superior sonics. I have found this true in my experiences in my audio journey, and I have gone through many amplifiers along the way.
I have some audio buddies on another forum and one of the leaders of this group purchased a Bryston amp, 7B model I believe, and compared it to the amplifiers that he has in his stable, two well known, (one of them oft malilgned in these kinds of forums) all with far less pedigreed reputations, and the Bryston was 3rd place in this group.
So if you have a chance to listen, I'd really recommend it.