Nib Grinder's "special" version of the standard CI. This nib grind still provides nice line variation will providing a smoother writing experience in a larger variety of writing positions/angles.
Formal italic, also known as a crisp italic will have sharp edges. Provides maximum horizontal to vertical line variation. Unless you are familiar with this type of nib it is probably best to try one before ordering one. It is also helpful if you have a "light" hand.
Allows for a super smooth writing experience with slightly less line variation of the cursive italic. Possibly beneficial to those that "push" their pen across the page.