As of 20 minutes ago, I am one of those people!
The FedEx guy got a workout ...

The 4704 feels much more like my F XT than the AT. My XT's springs seem a bit stiffer and the ping is ... ummmm ... "ringier" (think I'm making up word there).
The XT's case bottom is metal, but the AT's is plastic. I love Model Fs and I bought this (from Orihalcon) because of the amazing layout, and I don't know much about the 4704 yet ... but I think the entire case is metal. It's a beast for sure!