Whats the difference apart from the fact that AOSP roms have more customization?
I agree with what's here.
The reason I'm anxiously awaiting AOSP is because of profiles. I don't know why google can't adopt that feature. I mean everyone should have a work profile, home profile, and car profile; it's 2014! Until then I'm dependent upon Tasker to automate the process for me, using more resources.
For me, the only main difference I care about is Profiles.