Both MPC and BAEC can feed into the same AsiaMiles account no problem.

The main reasons for MPC (Diamond) rather than BAEC (Gold) were:

- access to The Wing even if flying on non-OW airlines

- priority baggage handling (at HKG this is great - never any waiting)

- guaranteed seat on CX at lowest published fare in economy

- allegedly CX has all sorts of invitation only events in HK (but unfortunately, despite being Diamond for the last 3 years they have never seen fit to invite me)

- top priority waitlisting (only one flight in 300+ that they failed to get me on); never fail (yet) to get redemption bookings