The 2005 GT has a more classic look, and a manual transmission that I know would appeal to many, but that 2020 GT just looks insane to me. I really like the look of the GTD, and this probably sounds crazy, but just the process of getting in and out of it and the room inside has a lot of appeal to me.
A friend has a Lamborghini and it's probably a more extreme example, but getting in and out of the driver's side is crazy. I couldn't even fit my leg under the steering column, and you have to twist in weird ways. Yeah, I'm old, but I don't think that's the issue, it's just a problem in general when you have try to squeeze your leg through someplace that it just doesn't fit, and I don't want to do a yoga workout every time I get in and out of a car.
Wait, the 2005 GT runs 128mph but only 11.6. Come on they should have put more modern tires on the 05 GT. Only issue is I don't think they even make the standard 19" tires anymore for the 05GT.