i just stumbled across the discussion, if WE9 Livewire edition is the best PES (since its between PES 5 and 6, best of both worlds, etc).
i also just stumbled across WE 10 LE - which makes it the last real PES? is it better than PES6? are there language patches?
Personally i prefer WE9LE, but the only diferences i find worth mentioning in comparison with PES5/WE9 are:
Better framerate.
Better sidebacks/wingbacks defensive positioning (without requiring to tweak the tactics) so by default i find that the CPU is better defending.
Slightly better ball physics.
Regarding the player's body physics, foul frequency, master league transfer frequency by CPU and and CPU Artificial Intelligence (for offensive play), i find them basically the same, but i do notice that WE9LE is better at interpreting custom tactics, but i need other people to give their opinion in this regard to have more feedback.
In the end, i understand an accept that PES5/WE9 are just more editing-friendly, since they come with five and two languages respectively by default, and share the same file structure, also you can rename things in-game normally because those versions accept the latin alphabet, WE9LE has diferent file structure and numbering, and is korean only so the renaming must be done exclusively with external aplications.
In my opinion, these three games are better than PES6 regarding ball and player physics, PES6 is better than them regarding the amount of game options and modes, AI attacking creativity (just slightly better) and popularity for patching.
I have not played WE 10 LE, but i can say that the best Artificial intelligence (both in offence and defence) is the one in PES2008 PS2, very challenging and creative, on another note players dribble and ball physics in this game are awful and definetly not my taste, but the passing and shooting animations are beautiful wich is confusing.