Impressive symmetry! Hmmm...by your posting's title, I get the impression that this photo is akin to those shape-progression questions on I.Q. or college-entrance exams. ---Perhaps a large pot and a small one, with sansevieria from shortest to tallest (the reverse of the first set). Yikes! Where's my #2 pencil?? How much time do I have left?
Well, that too. To quote Wm. Sharp (The Weird of Michael Scott): "Ah, by my saul thou'lt dree thy weird! Begone, were-wolf, till the day of doom!" Hey, let's hope so. Beauty and weirdness combined. Mystifying, yet fascinating.