According to the data of Baidu Encyclopedia and Baidu Library, the difference between small upturned tip and curved tip art pen is as follows:
The shape of the nib is different: the nib with a small nib is similar to an ordinary pen, but the top is inclined. Quyi pen has a curved arc in the middle of the nib, which can be used to write thicker strokes.
The elasticity of the nib is different: the nib with a small tip upturned is relatively hard and less elastic, and the line change may not be as rich as that of a curved pencil when writing. The curved artistic pen is softer and more elastic. When writing, you can change the thickness of strokes by pressing the tip of the pen to create richer line variations.