Some utilies read temps much higher?

I was recently doing some benchmarks and I noticed Coretemp and speedfan read 10* higher than realtemp and everest. 10* difference would make my idle temps pretty awful, should I be concerned or is this just a software issue?

speedfan reads 36* idle/ 58* load
coretemp reads 34* idle/ 56* load

realtemp reads 24* idle/ 44* load
everest reads 21* idle/ 42* load
hardware monitor (came with motherboard) reads 24* idle 44* load

also, the PWM fan isn't under much load, for gaming it may spin up a little bit but it hasn't gone "full speed" at all since I got a different case with better airflow.

I'm assuming that the motherboard uses the bios temp readings and is probably the most correct? if it was hitting 36* idle and 58* load the fan would probably be going all out because I have it set through bios to shut off at 60* and the auto controller is set to be sensitive and aggressive on the cooling.

but I want to make sure I'm not roasting my new chip, either.

*EDIT* for the nit pickers my room temperature is controlled at about 19-20*c and I used occt to load the system. Idle has no open programs and I have virtually nothing running in the background.