A Striker is just another name for a Forward. So there is no difference other than the fact that you are specifying that they play in the center rather than the wing.

A Center Forward latches onto crosses and passes to score but a striker creates his own chances

and knows where to stand for rebounds and tap-ins.

they have the same meaning, striker is more free in the court.

http://www.goaloo.com/1.shtml

They have the same meaning