Interesting business/profit analysis.
So LH and UA/CO uses CO/UA's expertise of using single-aisle 757-200WL to secondary German markets and specifically Americas >--< Regional Germany (STR/TXL/HAM) because the 757-200WL according to CO/UA/LH makes profit flying single aisle to these destinations (High end American/German business VERY TIME SENSITIVE, no FRA/MUC time sensitive bull-....).
This is similar to DLH widebodies from DUS-EWR/ORD/YYZ and transit to North America and possible other Americas (Latin/South America) via *A.
FRA/MUC allows intercontinental (not just Europe/North America and Latin/South America to an extent) transits which possibly are higher revenue but requires bigger planes and what-not...
Oh and true F and C.
Interesting they are separating the regional Germany/Europe to an extent profit sharing and true inter-continental from outside of regional Germany/Europe.
I guess they are separating the German-American and German market from the inter-continental market.