I think it’s mostly style.
I do, however, suspect that a wheel/tire combination that provides a specific tread width and rolling circumference might be lighter if using a lager alloy wheel and lower aspect ratio tire than it would be using a smaller wheel and larger aspect ratio tire to obtain the same tread width and rolling circumference. That lower rotating mass would contribute to higher mileage.
I’ve never confiirmed this theory, but would like to. If I had a tire shop I’d probably weigh the two options and find out once and for all.