Like, it's not literally the same, but it's still red, blue and yellow. Yeah, yeah, it's Diana's colors too, but you can't confuse her with Supergirl.
Kara is still the OG blonde, pretty girl in red and blue who flies around and punches things. Coming after Cassie in the Post-Crisis continuity doesn't erase the past history.
I think every comic book fan knows women can be tough and feminine. But not every single woman has to be feminine. Same goes for men. I can't think of a single feminine male superhero in DC. Maybe Bunker, but even that's a stretch.