These is lots of info on different pieces of this but I couldn't put it all together and need some help. I am flying MUC to wherever I take a TATL to JFK. As i make it out, I could go MUC-AMS and take either Delta or KLM or I could go MUC-CDG and take AF. I want to upgrade to BE if possible, otherwise Economy Comfort. I understand in AF I need to buy Premium E to upgrade to BE so is more expensive. I could also take a flight to AMS and go the next day to JFK as I have business in AMS. Too many variables to figure out but assuming I could get BE, what are the views of AF v. KLM v. Delta. Thanks in advance for any help on this.
Joe