BassDominator,
None of them are accurate. Certian procedures can be made to increase their accuracy, but they are generally very poor as far as accuracy.
Quad,
They read cooler. Given the same exact setup/grease/cpu, the one particular CPU would run at the exact same temp regardless of board. Transplate a cpu from an MSI board to an Asus board, and you'll get hte "perception" that you're running hotter, when in actuality, you're not.
SD,
Still fine.
Mike