https://www.cnet.com/news/pixel-3a-specs-vs-pixel-3-moto-g7-oneplus-6t/

The new Pixel phones don't get the Pixel 3's Snapdragon 845 processor, which is also found in the OnePlus 6T. Instead they have a Snapdragon 670 processor, which offers better performance than the Snapdragon 632 found in the Moto G7. However, we found the older Snapdragon 845 more powerful in our benchmark tests.

Read more at ZDNet: Pixel 3A's specs have near perfect timing given 4G to 5G transition