Well let`s see...PES1 is old, I`m sure you don`t play it anymore..save it for the PES collection, this goes for PES2 too.. PES3 is good so you can play it when you get bored of your GF

...now WE7 is good..alot of vets, gurus think that WE7 is better than PES3 so you can try playing WE7 more than you play PES3..now WE7:I will be released in a month and a half..I wouldn`t be suprised if they extend the release date.. so far WE7:I will have alot of things that were unseen in PES3 or WE7..like:
- Several languages: English, French, German, Italian, Spanish and Japanese ( I`m still not sure if this only applies for commentry or to the whole game )
- Couple of new tricks/moves/animations..
- Gameplay is slightly polished ( This is not 100% confirmed yet )
- Keepers outfits can be changed ..or edited..
- Fake stadium names can be changed to its original names i.e Trad Bricks - Old Trafford
- All roster updates from 2003/04 season.. this means Howard is in Man Utd, C. Ronaldo, Veron in Chelsea.. etc..
- I don`t know if this is true or not someone told me new stadiums as well..
- Nobody knows yet who the sponsor will be for WE7:I. According to a video clip posted by a fella who`s from China , in the begining of the movie Nike logo is shown.. but I`m assuming Adidas Fevernova will be the sponsor.. why don`t they add CL ball since it is an adidas brand..
Things listed above are seen on many web sites that advertise WE7:I such as play - asia . etc.