If the SSD components are exposed like in the Macbook Airs and ESPECIALLY the A1502 retina where they put it right by the vent that the fan shoots water into; yes. I have repaired at least half a dozen A1502 SSDs(I mean take out components and fix, not pirated diskwarrior) compared to zero issues of hard drives dying from water entering a computer from older generations.
In terms of standard 2.5" form factor SSDs, I would guess equal to a regular hard drive. Toss it in water yes it will get &&^&@@ up, but doubt some contact from a laptop liquid spill will do anything, it is harder to get the water into the right spot for it to become damaged.