Its just fanart.
Anyway lets imagine a reality where it was Superwoman instead of Superman. What would change comic wise?
I hate to say it but probably they would push the feminist angle way back when women where fighting to join the workforce.
That being said they would have milked like fuck the romance issues with all the love triangles way more that they did with vanilla Superman, maybe to the point of being a quintessential part of the comics.
In the 90s they would have gone sleazy like any other female hero the black suit would have been a battle bikini and probably still being shown here and there today.