Right, I've checked samples of Squash and Squash VIP, I can now see the difference
It seems a few minutes into Squash VIP, the main synth riff is pitched down. In the original Squash, it stays the same throughout the song.
Here is a clip to show the difference :p
The first 25ish seconds is Squash, then Squash VIP follows.
I want Squash VIP now