If your only goal is high-FPS gaming at 1440p/4K with minimal frame dips, the 9800X3D is the superior choice thanks to its massive L3 cache advantage. However, for productivity workloads like 3D rendering, compilations, heavy multitasking, and future-proofing, the 14900K still holds ground with higher clocks and more threads just accept the higher thermals and power draw.