Lip and Labret piercing, what's the difference?

There is little to no difference, except for placement. A lip piercing is usually closer to the lip, while a labret is done further down.

History: The Lip is a piercing done by many tribes in South America, Africa, and the Inuit and Pacific Northwestern Indian Tribes. One example is the women of the Sara tribe in Central Africa, who use saucer-shaped plugs to spread or stretch their lips after slitting.

ADVANTAGES: Apart from adornment, the piercings have no other practical advantage or use.

DISADVANTAGES & CONCERNS: Due to the location of the piercings, they are prone to causing damage to teeth and gums. 

MAIN HASSLES: The piercing must be cleaned twice daily during the healing process, which typically lasts 2-3 months. For the first 2-4 weeks, follow the Aftercare for Oral Piercings. Additionally, a change in diet is recommended for up to 2 weeks. The worst part of lip piercing is the swelling in the first 1-5 days, which can make eating and speaking difficult. A change in diet is needed to reduce swelling. We suggest cutting down on your intake of alcohol, tobacco, spicy foods, and ingesting other harass items. Additionally, cross-contamination prevention is necessary (such as refraining from deep mouth kissing for 8 weeks).

• Healing Time is 8-12 weeks. Oral aftercare must be followed for the first 2-4 weeks, & basic aftercare for the first 8-12 weeks.
• Common Jewelry 16g to 10g 3/8 to 1/2 labret stud.
• The post will need to be downsized during healing
• Circular jewelry should not be worn until the piercing is 6 to 12 months old.
• Axiom base with 16g Implant Grade Titanium Labret Stud - $75.00
• Pain level on a scale of 1-10 is between 2 and 3

Groupings: There are several groupings called "Bites" for more information