different between snaily vs saily

English

snail +? -y

snaily (comparative snailier, superlative snailiest)

Resembling or characteristic of a snail.
- 1851, Charles Dickens, Household Words (volume 3, page 422)
  So he and Dr. Hutton, the geologist, agreed that they would rise above the narrow fancies of the vulgar, and prove their philosophy by dining together on a snaily mess. They met, the dish of snails was brought to table, and the cover being removed, the two great men looked at their dinner with countenances very blank indeed.
- 2012, Timothy Morton, The Ecological Thought (page 99)
  In other words, simply because we're sentient—let's set the bar low to ensure that even snails and the snailiest humans are also responsible—we're obliged to address global warming.

sail +? -y

saily (comparative more saily, superlative most saily)

Like a sail.
- 1612, Michael Drayton, Poly-Olbion song 10 p. 157[1]:
  From Penmens craggy height to try her saily wings,

Send