How you differentiate Project Lead work & PM?

PM is the father of PROJECT LEAD WORK.....

Here in north america Project Lead can be above PM also

Good answer by Zafar sir. I echo with him..

Here even in Canada some time we call Project Lead person with title of Director even

Project Lead is more coordinator. PM is responsible for complete project.

Project Lead works under PM

In some countries, project lead and pm are the same but in many other countries, pm is the father and proj lead is the mother...

Some time different rtitles but same role