It was a serious question, as I haven't flown LH from LCY. Yes I can see that the lounge at the other end is better, but that is hardly beating BA in "every single detail"
I've never tried LH J on the LCY/FRA route but having done LH Y many times I'd assume the OP's points might be along the lines of:
* Do LH Cityline sell 2+2 in the J cabin?
* FRA T1 beats FRA T2 by some margin IMHO, not least becuase both train stations are right there across the walkway instead of being a bus ride away...
* LH haven't yet discovered the concept of "Afternoon Tea"
* The worst LH crew aren't as bad as the worst BA crew [sorry to put it so bluntly but I can't really think of a way to phrase it better...]