Kryptonians vs Czarnians

All out war who wins

On an desolate planet no outside help

Of course kryptonians are under yellow sun

Supes and lobo included

I'm going with the Kryptonians. Lobo is suppose to be one of the strongest of his race, and he still loses to Supes. A whole planet full of Kryptonians, some of which are supposed to be stronger then Superman depending on who is writing.

Czarnians

Lobo has beaten superman on his fair share of fights. Initially, Czarnians are more powerful and stronger, as they have no intrinsic weaknesses, coupled with the fact that they're just really strong. They're also very resistant to lots of different elements, such as electricity. However, I don't think they can get stronger under certain conditions, like Daxamites or Kryptonians when exposed to Yellow Sun Radiation/Light. I guess it really could go both ways

Czarnians are pacifists with the exception of Lobo.

That said, they regenerate from drops of blood, and their clones regenerate from drops of blood and so on.