Classification is different: gel pens are classified according to the tip type, including needle tube gel pens and semi-needle tube gel pens. Signature pens are divided into water-based signature pens and oily signature pens.

Different characteristics: gel pen has comfortable writing feel, low ink viscosity and proper lubricant. The viscosity of writing medium is between water-based and oily, so it is smoother than ordinary oily ballpoint pen. The nib of the signature pen is a fiber structure signature pen, which is soft and comfortable to use. It is constructed like a ballpoint pen and feels like a pen when writing.