The AMD Ryzen 9 9900X wins in 4 out of 14 comparable specs, with 8 ties. Its biggest advantage is Total Cores (50% better).
Ryzen 7 9850X3D wins in 2 specs (L3 Cache: 50% better).
Recommendation
Choose Ryzen 9 9900X if you want the best overall performance — especially total cores.
Choose Ryzen 7 9850X3D if l3 cache matters more to you.
