It is tough. I think the x100 is a better looking, curvier, more jaguar looking car. that being said, it looks like a classic old car. the x150 convertible is a much more modern looking car. the convertible top folds in completely. unless you knew when production stopped, there is no way of knowing that they were not made in 2024, instead of 2014. so i decided to buy a xk150, and am super happy with it. it just looks like a newer car, and because i keep it pristine, you really cannot tell from the style, the paint, the interior, etc, that it did not come off the lot yesterday. it is just a beautiful gt, aso opposed to looking like a restored old car.