In 1996, true 3D graphics on the PC were a pipe dream. 3D accelerators were nonexistent in the consumer PC market, while the Saturn and PS1 were optimized - albeit poorly - for polygonal graphics.
Powerslave was inaccurately ported to PC on the Duke Nukem 3D engine, because Quake wasn't available, then its PC-incompatible engine was used to bring Quake and Duke Nukem accurately to console.
Duke Nukem: Time To Kill and Duke Nukem: Land Of The Babes are nearly exactly the same game. It's like they made a game, then restarted and took all the exact same steps.