Queen's Blade: Rurou no Senshi, Seikon no Qwaser Recommendations
The end of the 2000 decade marks the advent of uncensored, hardcore ecchi being shown on TV. These are certainly similar not only in content, but they're also greatly produced. T&A.
Well, if there's an series tagged as ecchi involving combat, there's no doubt that Queen's Blade and Seikon no Qwaser share this characteristic. As such, both series has quite a lot of similarities:
*Both series has dominant female characters with supernatural abilities as well as skills in the art of combat.
*Both series has a lot of ecchi/fan-service with boobs occasionally used as a source of power.
*Both series has similar artwork styles.
*Both series should only be watched if you don't mind the fan-service as there's large volume of it.