Depends on what state you're in. Every state has its own requirements for both LPCs and LCSWs (even if LCSWs have a national association). Usually the differences are in education and number of hours required to become licensed.
However, I do believe that an LCSW's education tends to focus more on issues in the context of the community, and community interventions, while LPC's are mainly focused on the individual. In the actual practice of therapy, there is more differences between individual practitioners than between the groups as a whole.
LCSWs are recognized, licensed, and regulated in all states (of the U.S), while LPCs are not recognized in California and Nevada.
Pay most likely differs by where they work (non-profit, government, private practice), not by whether they're one or the other.