DJ,
I have driven a Ford GT and the GT40 is a very different beast. I bought my car from Dynamic and it was delivered in Reno.
There is a lot of work to make the Mark I rear clip fit compared to the Mark II. I have also driven a CAV GT40 and the fit /finish of the SPF roller is at a much higher level. IMHO
No comparison between the Cobra and GT rear/front engine, smaller lower package/monocoque structure vs a heavier traditional framed car.....very different but, the GT is more comfortable on the road at speed.
100+ mph in my Cobra gets your attention and keeps it, 100+ mph in the GT40 is calm/anticlimatic/steady and you know that it will stay that way to 150+.
The Cobra has a 4-speed top loader with 3:54 gears in the rear end and at 100 it is turning 4400 RPM the GT has a 3:77 ring gear with a 5th gear in the ZF and is turning 3100 RPM at 100.
TR