Was Viggo stronger than Gozer?

I think Viggo in a way was more powetful than Gozer.

Staypuff was damanged and knocked back by the proton beams very easily.

Also Viggo easily deflected the beams away from himself at the final battle.
He also rendered the entire team completly paralysed.
Remember he was not at his full level of power.

The four ghostbusters managed to close Gozer's dimensional portal, without any resistence.

I understand that they crossed the streams, but the portal in my opinion still closed to qucickly.

And yes Viggo is weakend by people singing! I found that pretty funny!

But he was a mere spirit and not yet merged with Oscar.

Who would win in a battle Gozer or Viggo- As he would be if he fused himself with Oscar?