There's only one Toni Kroos

Comparing notes with a friend last night we came across this strange fact about Toni Kroos, the young Bayern player. Kroos is highly sought after in FML because he is a 5 star prospect with a potential ability of 195+, one of the highest in the game.

Gw15 Toni Kroos has an acquisition fee of £325k and GW14 Toni Kroos has an acquisition fee of £1,000,000. (GW15 is top on the image, GW14 is bottom)

Why is one worth £325,000 and one worth £1,000,000 when their stats are so consistent? The answer surely lies in one has a much higher potential ability than the other - and proof that the same players on different servers are different due to some random element - potentially more pronounced than the differences between FMxx games.