This is a toughy.
Normally Ravage is awesome and his bio just ups that. But I can't stand how the show made him a Russian circus bear.
Grimlock's bio is cool and 1 of few who's toy US-ly stated he's the same character from G1.
Of course if he had been on the show, like Ravage, how would they have ruined him?
Wouldn't put it past the BW producers to view a G1 episode about him and base his voice and personality on that, out of contextly.
Especially if it were 'Grimlock's New Brain' !