The AMD RX 6700 XT is the objective winner of this comparison, securing victories in eight out of thirteen measured categories. Its most significant technical advantage over the NVIDIA GTX 1660 is its FP32 performance, which is 163% higher. This substantial lead in raw computational capability establishes the AMD RX 6700 XT as the superior hardware option based on the provided specifications, outperforming the NVIDIA GTX 1660 in the majority of evaluated metrics.

Users prioritizing raw computational power and performance should select the AMD RX 6700 XT for their build. Conversely, the NVIDIA GTX 1660 remains a viable choice for budget-conscious consumers, as it holds a 54% advantage in MSRP. If your primary goal is minimizing initial expenditure, the NVIDIA GTX 1660 is the more cost-effective option, whereas the AMD RX 6700 XT is the clear choice for those seeking the highest performance specifications.