They are called longwing or sometimes royal brogues in England. I think it's a matter of personal proportion, and taste of course. Perhaps on a small or slight man, a heavier shoe looks like more of a caricature of itself, more of a statement, and therefore more casual for it.
But as a thicker set man, with a large head and neck and resultant "presence", I find a heavier shoe doesn't necessarily look "country" or casual on me. Of course, brogues are country shoes in origin, but since they ceased to be functional (i.e. the brogueing for decoration, rather than actual drainage holes in the shoe), I think they also ceased to be exclusively casual. In the same way that brown shoes are now acceptable with a suit, there is no reason why a brogue should not. The last shape is important too. Mine are reasonably sleek, with a classic English toe rather than the heavier Austro-Hugarian "budapester" deep and round toe box. Even in a wider fitting as mine are, I think they're an elegant enough shape for city wear.
I love my double-soled derby brogues with a suit sometimes. Paradoxically, I think they are the only derbies I would wear with a formal suit - a plain toe "blucher" always looks a bit scruffy to me. But hey, we all have our own style. This one works for me.