Sexbot can be swapped by clicking on the girls in the left bar of the sex shop. As you play through and unlock them, you get more skins you can put her in. The arrows on the bottom of the sex shop will also rotate through the available skins.

It really wasn't a grind to get all that gear, money, and ammo. It was a touch slow to start with, until I grabbed the first 4 ammo packs, but after that, it was just like regular play for me. You really build up a lot of drops from that mission.

I think Bonetown would appeal to a broader audience, due to its exploration and player growth/reward mechanisms. Just exploring all of BT means you spend a lot longer on your first play through. However, I found BC to be a decent game, especially for one featuring animated sex. That aspect is where BC really stands out in the adult game industry.