I very much doubt F-22 is somehow resistant to time. The way its modernization goes (sacrificing stealth, supercruise and all external hardpoints to get to...basic capabilities for a modern fighter) shows it is not the case.
And since it isn't, I don't see much reason to treat F-22 as some unique capability any longer. Both can be detected by AWACS and GBADs, both interlinked and can fire under external cueing.
F-22 is much more of a plane, yes. As F-35 thread teaches us, it isn't that important. And as such, in model engagement (i.e. not individual flights of fighters over open Ocean, for example), you may treat both as "fighters".
Nothing outstanding about Gripen here, other than it being perhaps the newest available contestant. Rafale F5 or MLU Eurofighter (latter now having a shot at equal performance) will, in all likelihood, do the same.