This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
You probably mean the difference between 310-081 and 310-081, because I think that 310-082 was an upgrade.
Anyway, you'll find some information in the SCWCD FAQ. (What's different from SCWCD 1.4 and 5?)