I figured that out by looking at the diskette version of it. I had gotten the CD with the hopes of using the online manual while playing the game but unfortunately that will not be happening on the Plus, which now has the black and white version on it (from the diskette, which came in the older pre-SC2K style box).

I got another Sim Ant CD not long ago and it was the same way. Shame on Maxis for advertising compatibility with black and white models when they marketed the CD.