If you're doing carry-on only, connecting on the way down is pretty easy. You don't have to leave the secured area and can go directly to the Seabourne gate. I do 1.5 hour connections frequently and have not had issues. 1 hour would work if everything is on time and you're sitting near the plane door. I would do the 1:10 connection but it's not long enough to be comfortable for many people.

Going home, you'll need more time because you have to clear immigration, collect bags, clear customs, recheck your bag, and clear TSA.