Might explain why PAX describe traveling in the B777 as the closest thing they can think of which equates to their perception of prison sex. Firstly its something that should be avoided. If you can't, be prepared for something quite unpleasant, and which is excessively noisy and rough.
I've traveled in C class both on T7 and A 330, and the T7 is far better than the bus. As for the 380, I don't have a clue.