It looks like the Pixel Watch 3 will have the same Snapdragon Wear 5100 and Cortex M33 co-processor as last year's model, along with the same 2GB of RAM and 32GB of eMMC storage.
The battery capacity is once again confirmed to get a bump on the 41mm model, but it's the world's smallest bump: 1 mAh. Seriously, it went from 306 mAh to 307...
http://dlvr.it/TBfBPd