Ballpoint Pen vs Rollerball Pen

Essentially

- mechanically, they are the same,  with each using a ball point mechanism


- but
-- rollerball uses a thin/watery ink - smooth; fountain pen-like on paper; vivid > ballpoint; more likely to smudge

-- ballpoint uses a more viscous/oil-based/gel-type ink - thicker lines; smudging < rollerball (dries more quickly)
---- may require more effort/pressure-on-paper from writer



For all things pen, always helpful @http://www.fieldnotesblog.com.au/2012/03/ballpoint-vs-rollerball-pens.html