Hyundai seems to be making much better cars now ! Their quality is very good and they have great warranties ! The newer the better ! The Ford Fiesta has been sort of a problem child and lots of people have dumped them ! Don't know what year Hyundai you're asking about but I worked in the Automotive business almost 35 years and I would choose the Hyundai , if it's a newer model . I worked on a lot of them and was impressed !
Go with the Hyundai. It's a MUCH better product than it used to be and they've had lots of time to work out the kinks. The Fiesta, on the other hand, is still relatively new on this platform and doesn't appear to have as much long-term value.