The Intel Core Ultra 5 250KF Plus wins in 8 out of 14 comparable specs, with 2 ties. Its biggest advantage is L2 Cache (275% better).
Ryzen 9 5950X wins in 4 specs (L3 Cache: 113% better).
Recommendation
Choose Core Ultra 5 250KF Plus if you want the best overall performance — especially l2 cache.
Choose Ryzen 9 5950X if l3 cache matters more to you.
