I bought them both brand new. Only 30 miles on the Veloster and 18 on the ST.
I loved the Veloster looks. I know a lot of people don't, but I love the rear of that car. It reminds me of the Scirroco they have over in the UK. And the interior was very nice also. I'm huge on interiors; I think since I spend the most time there it should be very nice. The seats in the Veloster are more grand touring if that makes sense. They didn't hug as much as the Recaros but they were still very comfortable.
And it wasn't slow by any means. It's also on the lighter side, it's around 3,000 pounds I think. But the handling was just bad. They didn't change any of it from the stock Veloster. Now some people would say that's good because sport suspensions are normally rough and firm, as shown in the ST. But the body roll of the Veloster was just too much. I had an exhaust, intake, high flow catted downpipe on it, so trust me it wasn't slow. Only thing I didn't have was a tune because there wasn't a solid one out at the time.
But comparing it to the ST, it really isn't a match. The torque alone kills the Veloster, not to even bring up the handling. I will sacrifice a rough ride for superb handing and responsive, no problem. And that's what the ST does. It was a no brainer trading in the Veloster for the ST after driving it. No regrets at all. Especially after the Accessport and whenever I get an intake and some new wheels. Haha.