That's what I was thinking too, but after looking up and reading about alu-bronze, it doesn't seem to be the same material. I had a Lux and they are definitely different.
I just like the look of it. The buffed color looks great, and the patina looks fantastic. It is different than other materials, there's no doubt about it. All one has to do is have a look at some of the video reviews and you can see the difference.
I had a lux and have a stingray so I know they are not the same alloy but it's listed as 'copper, aluminum and brass' which is a strange description. It's probably some obscure alloy a wholesaler they use sells.