If someone says 'Empire definitely' they're just answering the question with their opinion. They don't need to say it's their opinion, 'cause it's their writing next to their username, so of course it's their opinion.
But you were actually imploring people to all of a sudden change their minds and agree with you that ROTS is at least equal to ESB.
"Oh, actually, come to think of it, I agree with you. ROTS IS at least equal to ESB!"
This, of course, has nothing to do with the price of eggs in China.