Technically, the main difference between GTX and S10 is that the S10 has got a different gear box. It is a notch better to drive than the GTX. But, getting a good S10 is not a easy task. Fiat sold only 500 S10's and some cars have been scrapped too. Hunting for a GTX is easier than S10. If you are particular about S10, I know one available for sale in Mumbai and another in North East . Skoda will be very expensive to maintain.