SEG-wise?
SSJ3 Raditz - 500,000
Freeza - 530,000
Freeza has a very small advantage, but Raditz seems to have a considerable amount of experience on the battlefield, since he wiped out planets along with Vegeta and Nappa, and he is also a Saiyan, which means he will have a lot of determination, durability, stamina, battle prowess, etc...so, factoring everything here, Freeza loses after a hell of a fight.
Using a x4 boost for SSj2, Raditz obviously wipes Freeza with out with a uncharged ki attack.