Maybe it's just "luck of the draw"? My FiL had an extremely accurate Dan Wesson 357 that developed a crack in its frame a few years back. It had a very low round count (about 1,000 rounds) and he was extremely disappointed with that. I shot it several times and thought it was an excellent shooter.
He shot my Taurus 689 while I was shooting his DW and was shocked to find that its trigger, sights, and accuracy were every bit as good as his DW. He is a very observant ex-engineer and military veteran. I agreed completely, but I wouldn't have said anything first because I wouldn't have wanted to imply that I got a much better bargain (especially after his revolver cracked).
After his frame crack he actually started stalking 6" Taurus Model 66 variants on Gunbroker, but was horrified to discover that there was no way he was going to get one for the $300 he was hoping to pay.
He is in it for the long haul and decided that he wasn't going to pay over $350 for a probably quite old Taurus 66 after he found some terrific bargain (I forget the exact price) on a brand-new Ruger GP100. And it is truly everything he hoped for. It feels great in the hand, has nice big sights, and had a very good trigger right out of the box. He and I agree that it is an excellent 357 magnum revolver.
Finally getting around to my actual point, his DW, his GP100, and my Taurus 689 all shoot about the same. Not one of the three is noticeably better or worse than the other two. I actually prefer my ancient beat-up 357 Blackhawk that I got used for cheap better than all of them, but he likes DA better and does not agree. It's luck of the draw. YMMV, but IMHO paying a lot of money for any particular mainstream brand is no guarantee. Brand X might be better than Brand Y, or it might not. It probably all depends on how the different pieces of equipment were adjusted that day, and how attentive the various technicians happened to be.