The AMD RX 6600 is the objective winner of this comparison, securing victory in eight out of thirteen measured categories. Its most significant technical advantage is its FP32 performance, which is 64% higher than that of the NVIDIA GTX 1660 Ti. This substantial lead in raw computational throughput establishes the AMD RX 6600 as the superior component based on the provided specifications, outperforming the NVIDIA GTX 1660 Ti in the majority of evaluated metrics.

Users prioritizing raw computational power should select the AMD RX 6600 to leverage its significant FP32 performance advantage. Conversely, the NVIDIA GTX 1660 Ti remains a viable alternative for specific use cases that benefit from its memory bus, which is 50% wider than the interface found on the AMD RX 6600. Choosing between these two components depends on whether your workload relies more heavily on the superior processing capabilities of the former or the memory architecture of the latter.