Hi guys, I am booking a flight on expedia and one of the leg is a SWISS codeshare flight with SIA.

The booking is on Expedia and it says Booking class T (Economy) as SWISS 4150 on a flight operated by Singapore Airline

For Singapore Airline, class T is a premium economy classification. Whereas, T is a promotional economy for SWISS.

So for the Singapore Airline leg, will I be following the Class T of SQ for Premium economy or Class T of SWISS for Economy.

Thank you in advance!