this are mine cubes with 200 m/s speed.
cube on right was with 0,97 flow rate, and left one with 0,96. But from calibration flow should be 0.97.
One more difference: left one has outer/inner, and right one inner/outer.
But check same settings but with different color (both PLA+ from SUNLU).
Each color behaves differently.
So I think that main problem is extrusion/flow rate. Values from calibration are to high.