The female partner (or receiving partner, if non-binary) is at the head of the pack in the female-superior posture.
The penetrating partner lies flat on their back to attain this sex position. The partner who is receiving ends up straddling the receiver's hips as they rise on top. After they've penetrated, they lean forward to make direct eye contact.
In a different variant, the receiving partner lies on top of their partner with their chest touching, leaning even further forward, similar to a reverse Missionary posture.
The receiving partner in the Cowgirl position typically leans backwards rather than forwards, thus this is different from that. However, because sex typically encompasses these subtle changes in physical position without considering them as uniquely "different" positions, the two phrases are sometimes used interchangeably.
With this setup, the receiver can decide how fast and how deep the penetration goes. A penis extender vibrator, such as the Vibrating Girth Enhancer Extension, can be an excellent choice if you and your partner are seeking increased sensations and a sense of fullness. They may take penetration at their own pace because to the receiver-on-top placement, which is especially useful with the extra thickness.
That which is "opposite" to it is the Male-Superior stance.