I don't know, but I just wanted to say that we upgraded at the airport for our return trip last December and actually I wish we hadn't bothered. The PE seats have fixed armrests and the recline is not much more than economy (on our flight). Because it was a very quiet flight, if we had stayed back in economy where we could have spread out, put the armrests up and laid down flat on a row of seats each. However, I appreciate that if the flight had been full this couldn't have happened anyway, but we learned our lesson!
Just a thought for you!
Pam