They have nothing to do with each other except for both
being published by Dreamcatcher/TAC in the US.
Destination Treasure Island was 1st person, a Kheops game with an annoyingly dumbed down combination interface. A disappointment compared to Kheops' previous game Return to Mysterious Island
https://www.mobygames.com/game/destination-treasure-islandTreasure Island was 3rd person (I think) and had more of a story.
According to the cover, it was based on the book.
I never got around to playing it.
https://www.mobygames.com/game/windows/treasure-island__Destination: Treasure Island uses TAGES DRM, which will probably need some sort of TAGES update in order to work on Windows 7/8/19 -- or possibly a NoCD.
I don't know about the other one.