Each has its own advantages.
First of all, the style of a bright-point pen is more beautiful than that of a dark-point pen. The thickness of the bright tip pen is not very fine, so it cannot write very small and thin characters. And the nib of a bright-point pen is easily damaged.
The dark-point pen tip is naturally not as domineering and beautiful as the bright-point pen, but it can be very detailed and can write very fine and small handwriting, which is of great office use. Compared to bright nibs, dark nib pen tips are less likely to get dirty and damaged.
If you are signing or practicing calligraphy, then Mingjian is better.
If you are doing office work, accounting, or studying homework, I recommend Dark Point.