Interesting how the same feature can be construed differently. I prefer the AA J IFE on the 763 (which is what AA operates on these routes) ... it is a personal DVD player with a selection of about 20 well-chosen movies. A lot better than the LAN IFE (for me). It is the AA 777 J IFE that sucks -- but not relevant to these routes.

AA J catering out of EZE is spectacular -- markedly better food quality and presentation than other routes (same menu but better execution). I presume SCL also has good catering (but I've only flown LAN F out of SCL, except for SCL-EZE and on that short route LAN is pretty poor in J).

For service, LAN is atrocious on the ground until you find the 1 person who is competent (and then the service is excellent); it took 20 minutes to change a full-J ticket from 1 flight to another an hour earlier (as my connection arrived early). In-flight is hit and miss, the FAs disappear at times but give good service at other times; it is no better than AA, just 30 years younger FAs.