There are different layered instruments to each theme that are added in if you check out those individual videos. V1 is just Layer 1's instruments with the intro and ending, V2 adds in Layer 2, V3 adds in Layer 3, V4 adds in Layer 4. Alternate is the officially released version of Mimic Chase which hybridize all the Layers and instruments at various points throughout the song randomly including the Intro (and also adds in some of its own new cues too)
What is the difference between these different versions?
There are different layered instruments to each theme that are added in if you check out those individual videos. V1 is just Layer 1's instruments with the intro and ending, V2 adds in Layer 2, V3 adds in Layer 3, V4 adds in Layer 4. Alternate is the officially released version of Mimic Chase which hybridize all the Layers and instruments at various points throughout the song randomly including the Intro (and also adds in some of its own new cues too)