To draw a contour, I also chose a digital way.

I made a line drawing in two ways: raster and vector.
And I try to do them in a different style.

In both cases, I was drawing on a Tablet PC (Cube i7 Stylus).

Raster

Clip Studio Paint Pro v. 1.4.1 (ex Manga Studio 5)
Textured Pen

Vector

Adobe Illustrator CC 2015.2 (v. 19.2.0)
Blob Brush