I see the topic is progressing. :D

Added after 47 seconds

A steam maiden?:D :D :D

In what way? In appearance? In color scheme? In what?
Not only are they different in appearance, but their concept and functions on the battlefield are also different. In short, it's pointless to explain. The best way is to go here and read everything for yourself. And regarding the visual similarity, I repeat: the units are different! Just because the models are made in the same color scheme doesn't mean that the creatures are identical. Don't talk nonsense, wait for the game to be released, and then you can really talk about something.
And, yes...

Spring Spirit / Snow Maiden
Sentinel / Crossbowman

In the first pair, and in the second, the units are completely different. Well, if they look alike in the first pair, as you claim, then there is no less similarity in the second.