The first time they sing the chorus line in Happy New Year, it shows Frida taking someone's top hat and putting it on her own head. In Felicidad, it shows the guy who wears the top hat waving it in the air. Also, the rest of the scenes which are from the "Super Trouper" photo session are different in both clips.
When Agnetha sings the lines "oh yes, man is a fool, and he thinks he’ll be okay, dragging on feet of clay. Never knowing he’s astray, keeps on going anyway." in Felicidad, it shows her still sitting on the couch. In Happy New Year, it shows she and Frida in their pink and purple suits.
When they sing the chorus the second time in Felicidad, it shows Agnetha and Frida singing it in their pink and purple suits. In Happy New Year, it switches between Bjorn and Benny spinning and Agnetha and Frida spinning.
Another difference is that in Felicidad, you see Bjorn change positions by the window. And at the end of the video, right before it fades out, you see Bjorn turn to go away.
Well, I don't blame ABBA for having the promo clips different. I'm sure it is very hard to do the exact same thing twice, once in English and again in Spanish... :P
