The Intel Arc B580 is the objective winner of this comparison, securing victory in thirteen out of sixteen measured categories. Its most significant advantage is its FP32 performance, which is 225% higher than that of the alternative. While the Intel Arc A380 remains a viable option for specific power-constrained environments, the B580 provides a substantial leap in raw computational capability that defines its superior standing across the vast majority of the evaluated technical specifications.

Users prioritizing maximum computational throughput should choose the Intel Arc B580 to leverage its significant lead in FP32 performance. Conversely, the Intel Arc A380 is the better selection for those who require a low-power solution, as it offers a 61% advantage in TDP. Selecting between these two components depends entirely on whether your primary requirement is the high-performance output of the B580 or the power efficiency provided by the A380.