Good grief, continuing in that vein indicates you're not merely being obtuse but are acting rather dense. When a statement like "good atmosphere" is made then it is patently obvious that it must be comparison, be it general or rigorous, based on personal life experience.
Don't be obtuse.
He's obviously comparing the noise we make at home with the noise they make at home (and possibly the noise of home fans at other grounds).
How would he know that even though it was loud at times nevertheless it wasn't one of our loudest?