[quote=Primal Conundrum]
If that's all they are, then it sounds like they're so barely different that there's hardly even much point in including them, especially since lizard people were apparently already intended to be included in the setting.
[/quote]

There are physical differences, which are relatively slight, and cultural differences, which are likely much, much greater. The latter are important too. You can use the same logic for elves vs. humans, who also have slight physical differences, but have great cultural differences.