Here is are the numbers, from a new Brookings/Urban Institute study:
...compared to current policy, Senator McCain would cut taxes by $628 b. over the next 10 years and that Senator Obama would raise them by $734 b. over the same period. Most of Senator McCains cuts go to middle and high income individuals, while most of Senator Obama's cuts would go to low and middle income individuals.
It goes on to say that Obama's tax raise may be markedly higher than the 734, since he has repeatedly proposed completely eliminating the current $250k income limit cap on payroll taxes (which would amount to a huge hike for high earners). He's also denied this at various points...so the study worked up his numbers without this change. The full post referenced at Capital Gains and Games is here.