I have a Pixel XL, original one, and it's always been good. This makes me want to switch, partially for the smaller size. I see my Pixel has a snapdragon 821 chip, and the 3a has a 670. Can anyone comment on whether the 3a would generally be faster/better than my significantly older original Pixel XL? I don't know much about phone chips, but it generally seems that the 670 is better than the 821 from a cursory Google search.