Both are very short anime. Both have simple animation, but are playful, colorful, with a nice, relaxing OST. Both have pretty much short story, but are nice to look at. If you liked one, check the other one.
(As Sweat Punch is collection of stories indipendent on themselves, this recommendation concerns only End of the World part)
Both are short, a bit trippy anime with short episodes. Both have similar animation and very similar feeling, but End of the World may be a bit more darker.