Its legacy and inspiration
Source: ForcesDZ
With the success of the F-22 Raptor, China and Russia took notice, seeing as they are the strongest nations other than the US. They created their own version of the jet, China created the Chengdu-20 and Russia the Sukhoi T-50 PAK-FA. Russia’s jet is the closest thing to the F-22 Raptor but with the innovations that are set to be implemented in the US version, it is likely to progress faster than the other jets.