But i think TAP has a reputation of a less than transparent relationship with its "fare families", "fare classes" and what it reports to other airlines for mileage purposes. Maybe this is more important for the wider array of fare fare families/classes in the economy cabin.

Going to Expedia for an indication of fare class certainly reveals J - but for all fare variants of the ticket.

Still it's a great fare, so if you need to be in Brasil it's worth a punt