That is true...but they include the same pay...
I would read the description in the job and not the title...i once had a company straight up try to higher me as helpesk...making helpdesk pay.. but all the duties were sys admin stuff...
Duties looked like :
Install,configure, administer, Active Directory in a 2008 environment
Install, configure, administer, SQL 2008 (must know how to write strong queries)
Configure and administer Exchange 2010
Install, configure, administer cisco brocade switches...
I was like "this doesn't sound like help desk"