I have stayed at all 4 moderates and I really like CSR, POR and about the same with the PO French Qaurter coming in last. It is fun to try the different resorts to get that different feeling. Where CSR is wide open with big views, POR has loads of trees (a forrest in the Alligator Bayou section) and doesn't have quite so many expansive views. The "river" is not really wide so it is not like looking across the lake at CSR or CBR. I love the 3 different sections at CSR and in particular the Ranchos but I like the forested Bayou section and last May stayed in my first Mansion home which really surprised me with the feel there. It really seems like you are satying in someones giant estate.
CSR is colorfull inside and out. POR is much more muted with greens, tans, whites, grays and light blues.
I like the food at Pepper Market best but I prefer the ambiance of the Cotton Mill food court at POR.
If you have been to CSR a few times go ahead and give PORt a try. It is just as nice and fun but in a different way!