It is the same one
Just to clarify, the "Hotel y Casino Colony" remained open after the revolution, although the casino was closed and the hotel was renamed "The Colony Hotel". It is still open, or was, until very recently, same old building with many renovations and new amenities.
The "Isla de Pino," where the Hotel y Casino Colony was located, was renamed "Isla de la Juventud" in 1978.
Note: There are and there used to be other small hotels throughout Cuba called "Hotel Colony". But these are/were very small, did not have a casino, and never made it to the history books.