Smoothness of surface
Than you, then this is normal issue 😀
I do not know for sure it is my explanation for the effect we see in our prints -- maybe someone has a better answer and can correct me 🙂 or even better, has a solution for the effect...
looking again at you photo's your problem is at the outside of the printed object, maybe you can slower the print speed and try again (i would suggest 20% lower speed)
My money is on loose grub screws for the belt gear on either the X or Y axis motor. If that second picture is from the front, check the X axis first.
thank you 🙂