I went with the 18 - but I drove both. Ultimately the deal on the 18 was better, I liked the color better, and it was better equipped for less money. Subjectively, I like the body lines better on the 18. For my Jeeps, I always preferred synthetic cable; but for this, I prefer steel primarily due to durability and I'm not using it a lot.
the majority of the upgrades on the 19 were lost on me, though the 12in screen looked great I prefer physical buttons I can feel with my hands. I did like the front camera, but the use case is pretty small and I've done fine without for this long.