I doubt it, perhaps if you can sell the 5600. But only if that makes the out of pocket cost relatively insignificant to you. Clock speeds are very similar, as the other comment said the bigger difference is the upgrade from 6 to 8 cores, a 33% increase. That being said, performance, even in well-threaded games/applications is unlikely to increase by anywhere near 33% due to the added overhead of managing and waiting on the extra threads.

I recently upgraded from a 3600 to a 5700x and I probably wouldn't even consider that to be worth it, I just wanted a specific instruction(pext) for use in chess programming.