The Pentel Pocketbrush is a bit heftier in price but I really like this pen when I am reaching for a more flexible tip. The real brush tip on this pen gives an authentic brush look to your calligraphy and you can't beat the darkness of this black pigment. The real bristle tip comes to such a point that the potential for thick to thin is high and once you've gotten the hang of the light-handed approach that this pen requires, you can really make it work for you. I will say, that in my example below, I may not have showcased that to the greatest degree because working in a 4" x 3" paper with this particular pen can be a challenge. I have better luck when I need to be writing a larger scale with this pen!