The Intel Core Ultra 9 285KF is the objective winner of this comparison, securing victory in eight of the fifteen evaluated categories. While the AMD Ryzen 7 9800X3D holds a significant lead in memory architecture, the Intel Core Ultra 9 285KF provides the most impactful advantage with its L2 cache, which is 400% better than that of its competitor. This substantial cache capacity serves as the primary technical differentiator between the two processors.

Users prioritizing raw memory hierarchy capacity should select the Intel Core Ultra 9 285KF to leverage its superior L2 cache performance. Conversely, those who specifically require the high-capacity L3 cache architecture should choose the AMD Ryzen 7 9800X3D, as it offers a 167% advantage in that specific metric. Your final decision should depend on whether your workload benefits more from the expanded L2 cache of the Intel chip or the L3 cache configuration of the AMD processor.