Feel free to add this to your OP,
@Gjwilly:
View attachment 578088
They both contain
witch of Agnesi curves—Siri more-so than the Win7 installer—and shift through multiple hues of light. Visually, the Win7 installer seems to be light changing colors as it shines through a crack while Siri is a collection of multicolored waves reacting to sound.
It's not a similarity I would've immediately recognized, but it's there.