What is the difference between writing with a brush and writing with a pen?

1. What's the difference between brush calligraphy and pen calligraphy? It is the difference between soft pen calligraphy and hard pen calligraphy;

2. What's the difference between writing with brush and writing with pen? Pens are more versatile, convenient to write and carry.

3. What's the difference between brush calligraphy and pen calligraphy? Brush calligraphy is more exquisite than pen calligraphy, and it is more laborious to practice.