To address a few of your points:
I'm fully aware of the different glass types between the two, I'm just curious as to if the newly installed panels are in fact gold in hue, using the gold on Royal Bank Plaza as a photo reference. (I was comparing the pale gold highlights on RBP, as that is the part reflecting only the blank grey sky, as with the Nobu picture.)
Nobu is definitely not getting the Pilkington Eclipse Gold that was specified (also not real gold) as it's too shiny to be that product (it'd appear a darker shade of gold and more transparent, if at least based on the few photos posted). I'd be curious that if there is golden glass being used, who the new supplier is.
I haven't seen this glass in person, but I'd also have doubts that it's gold from only certain angles as you describe, as from what I'm aware that'd be a hard effect to achieve without the final window product looking mildly yellow from all angles. Either that or being as expensive as just plain gold panels.