What is the biggest difference in quality you have seen in works made by a mangaka?

[Star_Of_Hope]

I am sure the art evolves after some time. Still, we are talking the quality in plot as well here.

 

[Grungie]

Yentato Kabuki going from Black Cat to To Love Ru

 

[Blackangel]

i would say by yusa sensei
and she only ever drew manga and none of them got adapted but her story quality is good

 

[Demon_skeith]

The big three for sure, like Naruto, Bleach and OP.

 

[Blackangel]

wow demon and yeah you are right
we can always compare those managaka with their other works for sure