Not sure what class or FFP your friend is considering.
Physically, assuming Y cabin:
- LH: 1 short haul + 1 nonstop long haul, full pax 744, tight pitch, no PTV, probably many German tourists
- KL: 1 short haul + 1 longhaul with stop in KUL, combi 744, average seats, no PTV, codeshare with PAL so probably a mix of Filipinos and Europeans; flight is often full.
- QR: 2 medium hauls, A330 (read: better chance of getting aisle seat), PTV, probably many Filipino overseas workers.
I would pick KLM for its superior FFP, otherwise LH or QR for the shorter flightime. Depends whether your friend feels more comfortable with a cabinful of Germans or Filipinos, although the QR 330 sounds more comfortable.
Unless miles are the prime consideration here, I suppose this thread will be moved to TravelBuzz.