>>217This site runs off the same backend, called LynxChan. Both Bunkerchan and FurChan seem to use derivatives of the same frontend, called PenumbraLynx.
Bunkerchan's frontend seems more similar to the base PenumbraLynx distro, while FurChan has a few modifications to things like post outlines, post content being removed when the quick reply is exited, etc.
They are essentially the same though, outside a few cosmetic differences.