One item that would be very important to me is/are the exterior body lines. The CSX more closely resembles the original 1960's Cobras. To me, the body shape is very important.
In terms of your performance dollar, the Superformance is a better value. However, if the Shelby name and future appreciation appeal to you, then you'll see the $40,000 of value, assuming that's the correct variance.
But any appreciation will take time. If your time horizon is short(er), buy and sell quickly, then the potential for appreciation won't matter as much. If you're thinking of 5-10 years, then yes, I see the CSX appreciation being a larger factor in the decision-making process.
But you can also take that "extra" $40,000 and buy Johnson & Johnson stock. It has a dividend yield of about 3% a year PLUS about 88% appreciation in last 10 years. And it's liquid.
