I went with the Pacifica, but I cross shopped the odyssey. That being said, we had rented a Kia for a week vacation and it was totally capable, but we crossed it off the list. It drove fine and actually got us okay with he minivan path in lieu of the suburban. But it wasn't nice enough for us. We have a 2007 Audi Q7 as the old family transport, so it's a tough act to follow and the Kia wasn't the right follow up. Like I said, we ended up with the Pacifica, mainly the driving dynamics were much more refined and the interior is a much better place to live.
Neither will give you good resale down the road, so no points there, the odyssey offers the closest comparison with the Pacifica, cost and content wise, they are neck and neck.
The Kia is nice for the price, but not quite as refined.
Good luck with your purchase, all that being said, I don't think you'll be unhappy with either van, they are both decent. At the end of the day, it's a box that seats 8 and some of your stuff. There is only so many ways you can accomplish the task. And until they hellcat the Pacifica, I'm happy with my purchase.