I think Vegeta should take this. There's more to Gohan's power other than Super Saiyan 2 in my book. Gohan brought out all of his power, that speaks more of Gohan's dormant potential than anything. Super Saiyan 2 was the means to express this power imo. Gohan's power against Cell is decently above what his plain old Super Saiyan 2 is.
There are tons of suggestions that Gohan gets a rage boost here, I'm just not ignoring them anymore.
Also, going by the feel of the story.
Super Saiyan Kid Gohan did not feel like a God. But Super Saiyan Vegeta and Goku in the Buu saga feel very, very powerful. Kid Gohan was decently above Goku at the Cell Game, but I wouldn't say monstrously so.