Brundle got a few things wrong yesterday, but he acknowledges them, appologises, and clarifies what actually happened, or what the running order actually is. He isn't trying to come across as an infallible guru. He just sounds like a bloke enjoying the race with you.
Legard on the other hand, made similar mistakes, but just ignores them to try and save his superficial guru persona for anyone stupid enough to not have noticed.
I can't remember which drivers were involved, but there was a moment whereby a significant overtake took place, I think it may have been Button on Hamilton, Brundle brought attention to it, Legard acknowledged it, then Legard decides now would be a good time to run down the order.
He does this by seemingly looking at the same live timing screen we get, and he said something like:
"So it's Glock from Trulli from Hamilton from Button..."
Where only half a second before, he acknowledged that Button had just gone past Hamilton.
Later on Brundle almost made the same mistake, but stopped himself halfway through, had a bit of a think, said sorry and then read it again correctly.
It's like Brundle enjoys the race, and is himself, and Legards priority is trying to sound like a commentator.
That said, asking for Allen to replace him weakens the argument against Legard. Allen seemed just as in love with his own voice.
Final thought: It's like Brundle face-palms along with you, and that's what makes him cool