It's not as binary as your sarcasm suggests. But we can learn from how they turned up in big moments in a way we did not. We can not be so arrogant to believe we can learn nothing from anyone else.
Wholesome sentiment in theory; but.......
What specifically DID we learn from them yesterday....? I saw a clearly inferior team pluck a performance out of their arse because as the cliche goes "form goes out the window in a 'derby' ".
What tangible, practical lesson do we take from that?