The usage experience is different, the pen refill properties are different, and the writing handwriting is different.
Ballpoint pens use the ball at the front of the pen core to bring out the writing medium. If the ball gets stuck or falls off, it will affect the use experience, while gel pen writing is more comfortable and smooth;
The writing edge of a ballpoint pen is relatively smooth, while the writing edge of a gel pen is rough;
The refill of a ballpoint pen contains an oily substance, while the refill of a gel pen contains a water-based substance.