Hello again, Michael. I've stayed at both of the resorts you are considering and I don't think you will go wrong with whichever one you choose. However, I would give the nod to
Port Orleans Riverside for a couple reasons. First, I love the peaceful feeling you get when you walk around the resort. The second is a sentimental reason for me as this is the resort where one of my boys found the courage to go down a water slide for the first time - we, as a family had so much fun in that pool! I also like that there is transportation available by boat to Downtown Disney. Again very relaxing and just adds to the laid-back feeling you get when staying here.
Coronado Springs is a beautiful (and huge!) resort and the Pepper Market is a wonderful place to dine. The rooms do have a deluxe feel to them, however, although I enjoyed my stay, this resort does accommodate conventions and I just didn't get the laid back feeling like I did when staying at Port Orleans. So my choice between the two would be Port Orleans.
I hope this helps with your decision. Let me know if you have any follow-up questions on your resort choice.
P.S. If you also choose Port Orleans, make sure you allot some time to visit
Yehaa Bob at the River Roost Lounge!