Vader was lulz in the WWF.
He pissed so many people off.
Remember Shamrock taking liberties thinking he was some super hard man cuz he'd worked Pancrase, so Vader took his fucking head clean off with a clothesline.
And that time Bradshaw called him a 'fat bastard' live on air before a match.
But I don't think he was much different in WCW. Vader always had that in his locker its just a case of if the promotion believed he was worth the investment.