No 4-2-4 is not two wingers! they are wing FORWARDS! different positions in that the wing forwards are more attacking than wingers. for players to be considered "Forwards" they don't have to be Centre forwards, they are different positions within a band such as forwards, defenders. For example in the Centre back position there are normal CB's then there are sweepers who don't necessarily have to be set up behind CB's. similarly in the forward positions there are different types of forwards Target man, wing forwards, second strikers, poachers etc. a wing forward differs to a winger!