Kajiit are a better race than Argonians because they are smarter, have a generally higher IQ, and are highly intelligent. They have natural claws, that outshine some weapons in the start of the game. The Kajiit also possess night vision. Although the Argonians have water-breathing, the kajiit are stealthier and speedier. The stereotypes against the Kajiit are untrue. The Kajiit are not all drug dealers and thieves. Many Kajiit are only trying to get by with simple merchandising, body guarding, and white-hat thievery (stealing for the government, professional espionage, etc.).
On the other hand, Argonians are the "devil in disguise" in my opinion. Because they are allowed in cities, they can have easier access to all of Skyrim's goods. therefore, they are much more tempted (and prone) to stealing/scheming/scamming. My main concern is in Riften and especially Solitude (The Capital of Skyrim).
In other (non-opinionated) terms, The Argonians are canonically and factually an inferior. In the lore of Skyrim and the greater Elder Scrolls universe, Argonians have always been the thick-skinned (and thick-skulled) characters. Many a brute by nature, others tricksters. The only major redeeming factor for Argonians are the fact they can breathe under water.
In conclusion, Kajiit are superior in a myriad of ways, mainly via the fact that they are sneakier, smarter, and naturally more evolved creatures. Argonians are unintelligent (mostly), physically inferior compared to other species, and are only special because they are lizard people.
Also, fun fact, Kajiit's "class/build" comes from when they are born, regardless of the parents. If the stars align (literally), the Kajiit will come out that way.
In my final conclusion, The Kajiit may have some relations with the gods of the Elder Scrolls universe, therefore are celestials as well as cats. So, Kajiit are half-god half-cat beautiful creatures and Argonians are slimy lizards with a magic tree that tells the future. Kajiit are better. I rest my case.
Sources:
My final source is my own game play/theorizing.
I can do it with you again because Argonian King didnt take it very seriously.
I am not Guggior I dont know who that is
I'd like to do this debate with you sometime
You aren't Gugigor, are you?
I think this debate is very clear cut. Up to the voters!