The Pathfinder daemons are basically the daemons from 3E with the addition of the Four Horsemen (which was basically what I was suggesting).
Your above excuse is pure sophistry.
They're very, very different in terms of motivations and desired end results in the long-term scale of things. I went out of my way to try to emphasize that and differentiate Paizo's daemons from the yugoloths of the Great Wheel, both because most of the IP surrounding the 'loths was closed content, and I wanted to make them unique enough on their own so that the oft-repeated criticism of the 'loths as being second fiddle to demons and devils wasn't an issue with the PF daemons (not that I agree with that criticism).
Other than being NE fiends, they're rather different beasts entirely.
Yugoloths were liars and manipulators. They were the oldest of the fiends, the architects of the Blood War, and the paradoxically self-important, utterly selfish -slaves- of the concept of Evil that they served. Mortals didn't matter, not at all, but they would suffer nonetheless. In their own words they wanted only to strive towards perfection and create a perfect multiverse: one which was utterly devoid of mercy.
Daemons are pitiful lost wretches venting their self-loathing on the multiverse. The daemons despise and obsess over mortal life. They want to see the spark of life extinguished from the planes. They don't care about pain, or destruction, or your suffering in the slightest. They just want you dead and to add another soul to the pyre. They aren't the eldest race of fiends, they don't serve baernaloth masters from the primordial earliest days of creation, and in fact they're utterly alone, with no greater masters to serve and at times flailing about as to the philosophical implications and rationale behind what they do. Everything will die, and then what? Perhaps they themselves don't know. There is no plan, there is only an unending hunger.
If you think the PF daemons are just yugoloths plus the 4 Horsemen, I must have failed at some juncture.
EDIT: That's my last on this subject since it's horribly off topic in this thread. Want to talk more, make a thread for it.