The Intel Core Ultra 9 285K wins in 8 out of 16 comparable specs, with 4 ties. Its biggest advantage is Base Clock (54% better).
Core Ultra 7 265F wins in 4 specs (TDP: 48% better).
Recommendation
Choose Core Ultra 9 285K if you want the best overall performance — especially base clock.
Choose Core Ultra 7 265F if tdp matters more to you.
