The AMD Ryzen 7 9850X3D wins in 8 out of 14 comparable specs, with 4 ties. Its biggest advantage is L2 Cache (100% better).
Ryzen 7 5800X3D wins in 2 specs (TDP: 12% better).
Recommendation
Choose Ryzen 7 9850X3D if you want the best overall performance — especially l2 cache.
Choose Ryzen 7 5800X3D if tdp matters more to you.
