There were a couple versions of the F1. The first one had the "classic" 4 band EQ section, the second version had semi-parametric mids. Not only that, but there was a red face version, also (I don't recall which iteration of the F1 on that one). I've never heard of a F1 450. Got pics?
Here is a photo of the 1st Gen, version that I had years ago, being modeled on top of the first LDS cab Don had made for me.
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I had a WW Super at the same time but never thought about comparing the two, tonally (they both sounded excellent). The WW Super was my rack system amp.
A couple of gigs shots, one each with those two amps.
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This is with the second, larger cab that Don built for me.