TSB quoting Tobirama " He is most likely using dark and light jutsu, capable of nullifying everything it touches"...
Well i think this clearly states that true name of this jutsu should be:
Onmyouton: Godoudama. But to be clearly specific it should be Senjutsu: Onmyouton: Goudodama.
Difference between Bijudama and TBS is simple. Senjutsu is lacking.
But in the end i understand Seelentau arguments. YOu cant really give Naruto onmyouton if it isnt written down anywhere. It is like giving all Uchiha Grand fire ball jutsu..which is basic ninjutsu for every clansmen, but for me reasoning, what was stated in manga it is actually canon, not something which was edited after or in the middle.