Personally, I'm less interested in whether Metal Jeans smells like vintage Fahrenheit and more interested in how good it smells, period. Is it different enough from the current Fahrenheit to be worth buying? How does it wear?
I love Fahrenheit, but I'd also love different variations of it, or different scents than smell a lot like it but with a slightly different take. I know Fahrenheit has flankers, and I do enjoy Aqua Fahrenheit, but I wish Dior would do limited edition Mugler-style flankers for it... flankers that are the same, but with a twist, rather than being more or less entirely new fragrances.