First, see here: (PSN - Final Fantasy Tactics) ...and here: (PSN - Final Fantasy Tactics - War of the Lions)
I don't have a Sony system, but I do own an iPhone. From the App Store, I have downloaded and am playing FFT-WotL. From what I can tell, it's the same as the original, with a few tweaks to work on a touch-based device. There isn't two versions within the Apple App Store, so I'm curious about the difference between the two on PSN. Can someone clarify?