Originally posted by Endless Mike
Kryptonians and Daxamites are completely different species (and Kryptonians aren't exactly that far above Daxamites in power, so your first objection doesn't work either).Anyway, it was just one idea.
Daxamites are Kryptonians that, well, moved to Daxam.
And had a douchebag infuse lead into their birth matrices, giving them their lead weakness.
And, for reference, it's never been stated that Kryptonians are more powerful than Daxamites. On a few occasions, however, Kal-El has claimed the opposite; Daxamites are more powerful than Kryptonians.
Kal has been known to vastly underrate himself, however, so it's much more likely (and logical, being that they're the samed damned species) that Kryptonians and Daxamites are approximately equal in power.