RealTemp is probably closer to being right with the 45nm chips. The newest versionof CoreTemp should match RealTemp.
Regardless the distance to tjmax is going to be the same with all of them, and that's what counts.
...rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual. -- Thomas Jefferson