I would point out Werdum was not "green" when he fought Nog, he'd actually been fighting MMA for 4 years by that point and was far from clueless standing having worked with Crocop's team for a couple of years. I actually think that boxing wise he'd picked up most of his game by that point, it was just that he lacked the clich game/knees he developed at chute boxe. On the other hand though Pride Werdum was much more agile and actually a decent takedown threat whilst UFC Werdum rarely got anyone decent down.
Also watch the second match and you see even an old declined Nog outboxes a UFC Werdum before losing via grappling which Werdum was just as good at or better in 2006. I strongly suspect 2006 Nog vs 2014 Werdum would pan out much the same way as the 2006 fight with Werdum getting outboxed, maybe he might offer a bit more threat in the clinch but Nog was actually quite strong there himself so would not be easy to do much against.