I ex father in law use to sell Kias...years ago...but he said more than half of them didn't work coming off the truck brand new. Now, a lot has changed and improved since then but they are still a car made in China.
Nissans are known to have a better name but also be much more costly. Personally, if it were between the two I would go Nissan, but I wouldn't just test drive two cars and choose between those two. What about Toyotas, Honda's, Ford, Mazda? They all have great cars.
It does sound more like a cross over that you want, verses a regular car. I bought used, got my car that was a year old for $13,000 when orginal price was 20,000...fully loaded and tons of air bags. Well worth the $7,000 off. It was a toyota and even after all the problems, I'd still buy from them.
My best friend drives a subrau...they are more expensive but she loves hers in the snow and such as it has all wheel drive. Gas isn't grand.
I have driven a Jetta recently and LOVED it. Again, tad more expensive and I would buy used.
Have you checked out consumer reports on any of it? I'm a big consumer reports person! Check out everything before I buy. JD Power and Associates also does ratings on a TON of things. This way you know whats behind the brand name before you buy and what problems others are running into.
Hundai use to be a poor brand but recently has gotten decent reviews. You may want to look into them too. I've seen nice cars by them on the road.
Whatever you choose you will know when you get in and drive that it is the right car for you. Go with that pick.