Hmm...you're definitely the expert, but with starting with a survivor, you get the luxury of being able to see original paint runs, paint dabs, markings, and no hidden (at least, mostly) damage/rust than starting with a basket case.
I think whether starting with either a survivor or not, you're still doing a ground-up restoration. It's just the end goal that matters, doesn't it? I mean, OEM NATS Gold vs. nicely restored, 1.5 condition, 90 point (not 97 or 98) car.