From the side, I prefer the '17. The old model is good looking, but a bit over-styled and slightly pinched in the middle. I prefer the headlights on the '17, not just from the front but also from the side. On the front, I also like that they eliminated the fake intakes around the fog lights, and integrated the fog lights into the lower air intake in a horizontal line, it makes the front end look more carlike and less ute. I have mixed opinions about the new grille. I like the fact that they got away from using generic looking horizontal stripes on the grille. But I don't like the "beak" on the '17. From the rear, it's a toss-up. I like that the '17 looks a bit lower and wider, but I not such a fan of the bulging arc over the license plate holder. That part of the old model looks better.
Overall, the sum adds to more than the parts. When looking at both cars in person, back to back at the dealer, the '17 looked a lot better to me. The old design, which was really fresh a few years ago, is starting to look a little generic now. It's a little too rounded and "cute". It also makes the car look narrow and tall. The new model looks wider and lower, even though the dimensions are about the same. It looks more mature and more masculine and aggressive.