Neither one tells you how many votes are outstanding ~ if you knew that, you'd know the votes!
It’s pretty clear the CNN numbers are % of votes counted; you’ll note that for each county in the country they have 100%; 100% of precincts have reported AT ALL, but they have not counted all of their votes - thus the “71% in” number they report for California, even though every county in California shows 100% of precincts reporting.
And running the spreadsheet assuming the statewide “% in” numbers are % of total votes counted, not precincts reporting, results in very believable vote totals that are similar to 2008; with the notable exception of Washington and Oregon (big mail-in voters tates) - must be something wrong with their % of vote in as the vote totals end up too high - and New York and New Jersey being low - Sandy an obvious explanation there suggesting in those states turnout was in fact down.