Different Logo's, Different "network" site, Same theme.

Hello all,

I am trying to differentiate the logos on my two separate "network" websites. http://www.ShortWayOut.com and http://www.shortwayout.com/tomaszewskipllc.
They both use the same theme and are is built on the "Genesis" theme platform. Anyway to switch the logo's without creating a copy of the theme folder?

Please advise, Thanks guys!