As previously posted all JFK-EZE are 763's. 777's stopped back in November.

If traveling in coach the 777 is preferable. Although the 763 has the MRTC just like the 777.

This is my personal observation having done JFK-EZE and MIA-EZE back a total of 10 or 11 times in Y, J and F: The crews out of JFK are just more pleasant and seem like they enjoy having you aboard. The MIA crews will feed you but then you had better go to sleep. Fine for some, but not all of us sleep so well in moving vehicles.

I'm talking about asking for some extra H20 or a sprite at 3:00 a.m. which can get you some real surly service for interrupting their galley chat. I'm sure others will disagree and come back with other experiences....that's mine from MIA....several times.

Also, the JFK arrives at 11:00 a.m. so most of the other int'l flights have already arrived and passed through. Immigration/customs goes much more quickly, though it's still quick and efficient with the earlier arrival from MIA, just not as long a line.