Only.. it does work as a comparison.
They're both horses, they don't fly or talk, they can both be ridden and would serve as a horse in every way.. but injecting an art style that isn't in line with what the game shows thus far would be out of place. That is the point.
(from my addition that you just missed)
Or better yet.. would it make sense to see Space Marine Power Armour and Bolters and chainswords being worn by the Garleans? They have tech to make armoured suits already.. so what's the the problem? The problem would be aesthetics. It wouldn't look like it's something the Garleans would make, it would look like it's ripped out of another world and they would stand out like a sore thumb every time you saw them because their look doesn't fit what the world presents as it's look
As for already having the aesthetic.. no, we don't. Clothes are clothes, but something like
https://www.youtube.com/watch?v=mWeOs7wpu70&vl=en is not a look of any of the tech styles within the game share.