Literally moments away from pulling the trigger on three steppers but I want to confirm something.

These motors from Zapp on eBay are SY60STH86-3008BF [link to PDF]

These motors direct from Zapp are SY60STH88-3008BF (note the 86- and 88-) [link to PDF]

The 86- set are much cheaper and, looking at the spec sheet I can't see anything that I understand to be a functional difference between the two other than the colour of the wiring. I asked Zapp but the email didn't quite answer the question though I probably didn't phrase it properly.

I'll be running them with PM752s. Could someone with a bit of knowledge say if there's a reason to go for the 88- instead of the 86- version? That £30 difference would be handy!