Riverside sounds lovely. My nephew, who works at Disney, has nothing good to say about it, but I’ll get to see for myself (and I don’t necessarily share his tastes)..and if I like it, maybe I’ll stay there next time! In fact, I’m looking forward to it!It's true you can experience both with a short 10 minute walk or a boat ride.
The difference for us is the ambience. I love the laid back tropical atmosphere of the bayou side and the beauty of the mansions side.
I admit I am not a fan of the mardi gras look with the loud colors and statues, but that's just me. Either one is great and I know you will have a great time