I am flying to Mexico next month. For my flights (operated by DL) I have the option of purchasing at identical price from Delta or Aeroméxico (with AM flight number, operated by Delta).
Questions:
1. Am I understanding the charts correctly by understanding that if I purchase from AM, I will earn my redeemable mileage based on miles flown and if I purchase from DL I will earn based on price, but will earn same MQM's regardless of who issues the ticket?
2. As Delta Gold Medallion, are my status upgrades or any other perks handled any differently by Delta if I am flying with an Aeroméxico flight number? Or is there any other advantage to flying on a DL flight number that I am overlooking?
Thank you in advance.