I wonder if you can notice any difference at all between the different bonus stages for example speed 1 and speed 2 or head game 3 or 4 and so on?

I believe that the difference shows up between those levels in goal scoring abilities,U will find some CF with Th5,Sp5 & other special abilities,most likely those will be able to score more,the higher the level,the better the player gets in performing!

Ok, thank you for the answer