The Le Pen "B" is very similar in feel to the Faber Castell "SB" and the Copic Multiliner "BS." They all have longer tips that are more flexible than most in this pen roundup. The Copic Multiliner is alcohol based, however, and "Copic safe."
Other than that, these 3 are interchangeable to me and I, personally, don't have as great of control with them for any intricate lettering. However, they are ones I'll grab if I'm trying to achieve that extreme bold downstroke brush calligraphy look.