Take the A330-200 out of Charlotte. Lie-flat seats vs angled seats. 1-2-1 configuration with direct aisle access vs 2-3-2 angled seats, climbing over some one and the dreaded middle seat. Plus you could have me as a F/A
The A332 and 77W are almost identical, apart from some more stowage, a bit more privacy than the A330 and some more bells and whistles on the 77W.
Also I don't mean to be pushy but it would be awesome if you could write a trip report on such an unusal flight that does not get covered oftern here. I flew to São Paulo a few nights ago, as an off-duty F/A and will write a quick trip report.