Earth would be a wrap. King Piccolo would be too stupid to ignore Radditz and get him AND Kami murked, thus erasing the Earth's only defense against a cataclysmic event: the Dragonballs.
When Frieza's scouts eventually touch down on Namek, I'd assume Guru would instruct Nail or some other "pure-hearted" soldier to wish himself into a power (maybe immortal) and protect their race.
If all else fails and Frieza's empire gets dangerously big, Grand Kais would just step in and pull the plug similar to The Machines vs. Smith in Matrix Revolution.
All I know is Vegeta stands no chance no matter how you cut it. He'd probably get himself killed quicker since he'd still be relying on a scouter to measure power levels.