The angle and lens you picked is not very representative. It's more closer like this.Just my opinion but the '18 looks way better from the front 3/4 and more aggressive and has better lines. The '15 just looks all over the place with those hood lines/side lines/ridges.
Lights are weak/small on the '15. Front is soft vs more angular on the '18.
wow. What a mess they have made of the front end! I was expecting something more cohesive.