After getting the Walgreens Brainstorm, and borrowing the Japanese version from Justowen, a comparison of the five, to see that the
Walgreens version has the Gen1 toy colours, while the SDCC 3-pack version has the GEN-14 colours (and the JP version is supposed to have the Gen1 cartoon colours)...

Gen1 - Walgreens - GEN-14 - SDCC - JP


Walgreens - Gen1 - SDCC - GEN-14 - JP


Of the three colour versions of the new Brainstorm, being a nostalgic collector, I prefer the aqua colours. The light blue of the SDCC version
looks too faded and blue, while the mid blue of the Japanese version, is too blue (for me).