In the additive colors game (PrimaryColors) you use color lights to turn a black "stage" white. In the subtractive colors game you use color pigments to turn a white "canvas" black. If that is a similarity, it is the only one.
PrimaryColorsII is more difficult. It is not based on Tetris model. It is two dimensional. It does not have an obvious strategy. Also, it has a maximum possible score, which, when you reach it, you will know for sure that you have arrived.
Full Specifications
What's new in version 1.6.0
General
ReleaseAugust 26, 2008
Date AddedDecember 31, 2007
Version1.6.0
Operating Systems
Operating SystemsMac OS X 10.4 PPC, Macintosh, Mac OS X 10.3.9, Mac OS X 10.4 Intel, Mac OS X 10.3, Mac OS X 10.2