Excellent info. If my Schengen flight departs from B I will walk to the FCT for the car ride (and a little exercise getting to the FCT). Otherwise I will figure out how to get to FCL B.
The FCL B is not a good choice if you are departing on a Schengen flight. As it is a non-Schengen lounge they can’t drive you to your flight and you will have to go through passport control after leaving the lounge.
Your options are either the FCL A which has a view or the FCT. From the FCL A they will only drive you to your flight if it leaves from a bus gate.