Although I liked Aria better, Dawn has some redeeming factors, a few of the boss fights were better (namely Death), the game felt more polished(graphics and quality of sound - not the OST), the weapons/ souls crafting added more in the direction of COD, Julius mode was world's better, and the Paranoia/ mirror world aspect was interesting.
All in all it didn't surpass AOS, but it was still arguably better and more inspired even than POR - hell the Julius mode's diversity in characters outshone having two very different playable characters (Although I tend to tie them due to POR having introduced the Level 1 hard cap and one of the greatest final boss fights of all time).
If DoS is an 8, AOS is a 9 imho.