The only difference between the issues is FZT, PZT & ZT
with the main catalog number still being 36310.
Both sides of the cassette issues are still exactly the same.
Sorry, but the varient is so minor that it does not warrent a separate issue.
I chose the Purple label since the logo is on the back of the cartridge, and it's Double LP counterpart is also clearly on Purple, so I thought it was best that both releases match each other.