My Armours Stainless siamese zorst is as good today as when I bought it 40 years ago. (for 39 pommie quids... eat yer hearts out youngsters!)
It fitted pretty well if not perfectly, (and I probably could have worked on it a bit to perfect it, but it wasn't 'out' enough to warrant the work).
I bet I'd have gone through a few rusting chromed systems in that time. Any marring is dead easily polished out to look like new.
Also, if any modification is required it's easily cut / shut / weld without needing to re-plate.
No contest.