Stainless steel comes in different qualities. The highest quality is, I believe, 304 brushed stainless steel. I think the Rangemaster is a good quality SS, but not the 304. If you can take a look at a Rangemaster in a showroom, then you can decide if its appearance is acceptable to you. I do not think it will wear or perform any differently from the 304. But the 304 has a softer, finer patina to it. And it's typically more espensive.

You should also consider that you may need spare parts some time in the future. If you get the Rangemaster, buy an extra set of filters and maybe the plastic translucent shield that covers the light bulbs. (I assume it has one, but I'm not sure.) You just don't want to get stuck with a broken something that cannot be fixed or replaced without getting a whole new hood.

Good point about the stainless grades. There's no spec shown for the Rangemaster stainless, but its replacement the E603604 is described as Type 430 with a #4 brush finish. The pricier WP29M Series is specified as Type 304.

A few places have reduced the price of the 36" Rangemaster to
about $450 because it's being discontinued.