I played UC4 online for the first time yesterday, playing coop with a friend. I can't honestly see why ND are held in such high regard after that experience. The interface is shockingly ugly and somewhat confusing, the visuals aren't all that pretty and the framerate was atrocious. Motion blur had to be whacked up full to disguise the janky mess of the frame pacing. Camera was stupid leading to situations where you're hammering the melee buttons wondering what you're hitting (if anything) as it's off screen. Coupled with lacklustre overly-complexified gameplay versus UC3 and a clearly microtransaction-fuelled money-grab strategy in the balancing, I see ND's position as far from unassailable.
SWBF has far nicer visuals at 60 fps and that's multiplat. It also doesn't have radioactive glow-in-the-dark rocks.