I know it may sound weird but... I think this is the 1st time I see both Argonian & Khajiit in one ESO wallpaper / art.
Some time ago, I watched a twitch stream with Devs and they said that when it comes to Beast Races - they just want "A Beast Race" to be there, somewhere on the art (loading screen etc). The result is that they are choosing only one, and consequences of this decision is that we either see a Khajiit (most often) but very rarely an Argonian.
Anyway - Much Appreciation for adding both Argonian & Khajiit !