What is the difference between a drifter and a transient?

From the definitions and links below, it appears that the difference is that a drifter doesn't have work, while a transient typically moves because of work


A vagabond or "drifter" is an itinerant person. Such people may be called drifters, tramps, rogues, hobos or jorie. A vagabond is characterized by almost continuous traveling, lacking a fixed home, temporary abode, or permanent residence. ...

http://www.google.com/url?q=https://en.wikipedia.org/wiki/Drifter_(person)&sa=X&ei=suMcTfDCO8PBngfet6WIDg&ved=0CBUQpAMoAQ&usg=AFQjCNHVUsz2WMpetB8mRXAnzrEabIpU1g

one who stays for only a short time; "transient laborers"

http://www.google.com/url?q=http://wordnetweb.princeton.edu/perl/webwn%3Fs%3Dtransient&sa=X&ei=5eMcTcCtCMiznAewprnUDQ&ved=0CBQQpAMoAA&usg=AFQjCNG_BQtZH4PnMwb679XFmilumF9S4Q