so I know that they both evolve sinistea but what is the difference?
The Cracked Pot evolves normal Sinistea. The Chipped Pot evolves rare Sinistea (1% encounter chance), which its evolution now having a small authenticity stamp on it.
They both have small visuals differences in the bag, with the cracked pot having a hole and a streak, and the chipped pot having three holes.
Cracked Pot (sorry for the small image) Chipped Pot (sorry for the small image) Source 1 Source 2 Source 3