This topic does roll right back around repeatedly just like to shave or not to shave (the bush), personal hygiene topics, upsell/fake pics, pimped or not pimped....oh well, it's good to hear new opinions I guess.
This was the last thread on this topic back in August.
http://www.eccie.net/showthread.php?t=281255
There is a lot of gray area here but the major difference is that GFE probably has a little more romantic and sensual element to it whereas PSE is more along the lines of sweaty, body slapping sex with a lot of dirty talk.
Or maybe GFE means that you go out for 3 weeks and talk on the phone a lot before you have sex by candle light after a romantic dinner. PSE means that there is no plot, you don't even know each other's names and you have sex 15 minutes after you meet.