Noodler’s ‘Bulletproof’ and ‘Near Bulletproof’ Inks

What is the difference between Noodler’s Legal Lapis Bulletproof (waterproof) ink and Noodler’s Air Corp Blue Black near Bulletproof?

The first image is before boiling:

and after boiling for three minutes

The Legal Lapis ink does not fade at all. These inks were purchased from the good folks at pendemonium.com.