Well, I've got a fair selection of wrenches from many makers and countries, most of them not my own, so hopefully I can give you a balanced view!
After nearly 30 years of owning them, I reckon Snap On make the best wrenches overall! Good materials, good machining, heat treatment and finish all mark 'em out as the best to me! Now, I know somebody will say 'Fred Sprocket tested them and found that the Bearsarse brand was stronger' or whatever! Sure they are. It's easy to make a strong wrench, just make it bigger, but overall Snap On are the best!
Don't have much Matco here in the U.K. but we have Mac. They're nice, but not in the Snap On league! Of the other U.S. makers, Wright are probably the closest to Snap On quality
Of the European makers, I have a lot of Stahlwille and that's nice too. Finish not as shiny but it wears really well. Overall their wrenches are pretty close to the Snap On. Hazet are really nice nice too. I particularly like their combination wrenches which are almost identical in proportion to the 70's era Britool which are my all time favourites, but long discontinued! I would recommend the Hazet without hesitation! Tools from Germany are a good place to buy 'em too!
Hazet, together with Snap On, and I suspect Stahlwille, are one of the few manufacturers who actually broach their wrench jaws rather than just punching them! This process makes all the difference, as you can see if you look at the quality of the finish inside the jaws, where it really matters!
The 'new boys' here are Nepros. Although they are a new name compared to the others, their parent company is not, and for the couple of years I've owned Nepros I'm already forming a very favourable impression, and would rate them up there with Snap On, Stahlwille and Hazet!
I very much doubt that any particular make of wrench works any better than any other in tight corners so maybe buy a 'test piece' from each of the makers you are considering before buying the whole set! In truth, I doubt you will be disappointed with any of 'em!
As a matter of interest I don't particularly like the Snap On Flank Drive Plus! I seldom need to exert that much force on an open end that the feature is needed, but If I'm working on a classic, which I often am, I don't particularly want the fastener marked! Regular Flank Drive would be my choice if you go the Snap On route!