Soldato
Pro Evo is not perfect but it offers much more freedom to play the game how you want and not so forced on you like Fifa.
Neither PES08 or Fifa08 is perfect and both have similar flaws - both demos can still feel scripted / on rails at times, even with ' super cancel '.
Fifa08 feels a little slow, but then again PES08 is a little too fast /arcadey.
I'd be tempted to say that Fifa08 plays a more realistic game than PES08 going by the demos.