More discussion on this topic in this existing thread.
EXST on Delta?
i wouldn’t say that “normally” FC is less than 2x coach, but of course I would check both.
When you’re traveling with 2 passengers, 3x coach will almost always be quite a bit less than 2x FC since each pax is effectively paying only a 50% premium vs 100% when it’s a solo pax for the extra seat.