The Google Pixel 3a and Samsung smartphones typically feature different processors and hardware specifications. The Pixel 3a is powered by the Qualcomm Snapdragon 670 processor, while Samsung devices, depending on the model, may use either Qualcomm Snapdragon processors or Samsung's own Exynos chips.
If you're comparing the Pixel 3a to a specific Samsung model, it's best to check the specifications of that particular device, as Samsung's lineup includes a range of models with varying processors and performance capabilities.