Tag power is interesting, but I really didn't like it.
DoR had better characters (IMO), much more balanced gameplay, a decent story, better music (IMO) and the whole gameplay felt like you're in a war, instead of this kiddy joke of a war. (Not saying DS was bad. Just thought it felt too kiddish for my taste. Still an excellent game.)
I do wish that it had a few more COs, and a better commander system. Some CO's powers were useless, while some were just simply overpowered.