The AMD RX 6900 XT is the objective winner of this comparison, securing victory in ten out of thirteen measured categories. Its most significant technical advantage is its FP32 performance, which is 324% better than that of the NVIDIA GTX 1660 Ti. This substantial lead in raw computational capability establishes the AMD RX 6900 XT as the superior hardware choice for users prioritizing high-end performance and processing power over other considerations.

Users who require maximum computational throughput should choose the AMD RX 6900 XT for its massive advantage in FP32 performance. Conversely, the NVIDIA GTX 1660 Ti is the appropriate selection for budget-conscious buyers, as it holds a 72% advantage in MSRP. By weighing the necessity of raw processing power against the benefit of a lower initial cost, users can determine which of these two components aligns best with their specific build requirements.