Originally Posted by
NWIFlyer
LH P will map to something unknown in AC's business class fares (but probably straight across to P given the strong codeshare arrangements between them and the similarity in flexibility [ie none!]). As all AC business fares currently earn at 200% in M&B, it really shouldn't matter to you which it is. What it earns in M&M is not relevant.
As you've identified, do not take the LH-operated flight which will earn you precisely nothing!
As this has been booked, I can confirm: LH P = AC P. Since all the flights are on AC metal, 200% mileage accrual. Not bad for a C$ 2,500 business class round-trip fare (all in) from the West Coast to Europe!