An article by
Warren I. Pollack in
Hosta Journal (2020 Vol. 51 No. 1) titled
Doppelgänger Hostas: Fancy Name for Look-alike Hostas, included a long list of hostas which various
hostaphiles, published articles or other sources have indicated "look"
the same. Some of these are, in fact, the same plant with two or more
different names. Others are hostas that vary in some minor trait which
is not immediately discernable to the casual observer such as seasonal color variations, bloom traits, ploidy, etc. So, as Warren mentions,
hostaphiles may differ as to the plants listed but then, their opinions are based on visual observations and interpretations.