Both will leave the viewer confused and wanting more. They have unique art styles - in case of Kyousougiga it is colourful and bizarre, while Cencoroll has an almost monotonous and dull art style. Unique characters doing unusual things in their unique world, both will give great enjoyment to the viewer.
Both titles have an extraordinarily similar experimental atmosphere. Adding to the experimental nature is a unique animation style, which is common between the two, but they still possess differences from each other. Both are almost completely nonsensical and wacky, with each scene of strangeness only leading to another. The characters are also similar. However, it is not in the sense that the characters resemble each other, but, rather, in the sense that the creators had similar visions when creating them.
If you’re looking for something a little different, and you enjoyed either of these titles, it’s likely that you’ll enjoy the other, as well.
Both series have bright colors to their animation, but there is some deeper meaning as to what everyone fights for in their case. Interesting as it would be, there are aliens just roaming places like it's nothing.
Both are alternative versions of Alice in Wonderland. HNKNA centers in harem/romance while Kyousougiga is a crazy random journey centered in adventure/supernatural/comedy. In both, the main girl who is transported to another world is voiced by the same voice actress. We also have twins and the White rabbit in both.
Redline will get your adrenaline pumping with its astronomical amount of craziness mixed with abstract art. This movie has more storyline and is easier to follow than Kyousougiga, but both are still amazing.