There are two releases of the DOS version, the first version was a 16-colour only version. The re-release contains both the 16 colour and a 256-colour version.
Note: Some boxes indicate a minimum of DOS 2.0 and other indicate 2.1. The only difference between 2.0 and 2.1 is that 2.1 adds support for the IBM PCjr. Likewise a Tandy 1000 would require at least the special Tandy OEM release of MS-DOS 2.11.