Well, since then I've used the Milani eye liner a few times and I'm ready to share my thoughts on it now. =)
This Milani liner blows the Urban Decay liner out of the water!
Its pigmentation, smoothness, staying power and price makes it a better eye liner pencil.It is a true jet black, and an intense one too (the metallic in the color is very subtle and is very fine).It easily glides on, no tugging on the skin whatsoever.It doesn't claim to be waterproof, but it is long lasting (use with an eye primer to achieve maximum staying power).Available at drug stores, it also comes with a drug store price (I got mine for under $7).Both the Urban Decay (which retails $17) and Milani liners are 1.2g in quantity.
I definitely recommend trying the Milani liner if you are already a fan of the Urban Decay one... you won't be disappointed. =)
FTC: Products mentioned are non affiliated and non sponsored. Items purchased with my own money. Opinions remain my own.