Nothing you will remember. I tried EZE-SCL-JFK in business class, and is nothing out of the extraordinary.

I used to complain on TAM GRU-JFK business class on the old 767 they have, but sadly they are superior than Lan.

The plane overall is better, but the services you get are not equally improved. Lan 767 GRU-LIM or LIM-JFK has superior service in business class.