She ignored the jibe, Kara knew she wasn't stronger than him, but she was strong enough. If he hit the building like that, then she was strong enough. Maybe not strong enough to defeat him, but strong enough to do a little damage to him. She'd worry about the building later.
The punch was stronger than any she had ever received. Not that she had gone up against many people with super strength. It almost felt like her father, who had so easily taken her down, only she knew Superman-Prime had to be stronger than that still. Kara would wonder later how her entire face wasn't deformed after that.
The building she smashed into looked worse off than she was. Solid brick crumbled around her as she went through the wall, and found herself looking at the ceiling of some kind of department store. The screams were already coming from around her. When she raised her fist to wipe across her face, it came back blotted with blood. She pushed herself back up anyway, appearing at the hole she'd created in the wall.
And that was when she noticed Superman had joined in, the first to respond. At least the communicators were affected. She pushed off the floor, creating more cracks to add to the damage and launched herself into the air again. Clark might of been there, but Kara was already thoroughly pissed off. All that was going through her had were some of the things Diana had taught her, and how she'd love to try them on Superman-Prime. Either Superman was going to help her, or he'd try and stop her. Either way her fist was going for Primes stomach, her knee for his face, and he elbow for his back. She'd have to make a mental note to try and bury him into the ground below, at least once. How man would that make him? Not that it mattered, Kara didn't know how to give up.