OK, so I was mistaken. Magma is a replacement for Fuchisa--it is different.
After more extensive research and more than a few e-mails, PGC has decided that Magma is a different coloUr (as it is for Europe.) The plastic is more purplish, while the buttons are slightly darker. Click the link to see a comparison of the 2 colours' boxart. Who knows why Nintendo decided to change more than the name this time?!
Special thanks to JskieXL and all the others that took the time to point this out.