I pondered in one of their official social medias if it's an emulated version, and a staffer commented this:

Both DOS and Amiga versions are included in the original Cinemaware Anthology installer.

However, we have upgraded all the DOS versions (now they come with proper sound support!) and offer them as individual installers (per game) for Windows, Linux and MacOS!

Note that the Anthology installer is based on the original pack and doesn't include those upgrades.

Dunno if the emulated files are easily accessible within the game files (can't test now), but a win for emulation!