Timing belt part numbers

[macquatic]

Bought a timing belt kit for my 1.9TDI PD Passat AWX 2004
The kit number is 038198119A.
On the belt box the part number is 038109119P but the belt itself is part number 038109119S.
Is there any difference between the "P" and the "S" belt?

[macquatic]

From what I've trawled the "S" belt is light brown coloured on the inside

And the "P" belt is black

Any thoughts?

[Crasher]

On the ETKA notes for the kit it says "caution: either 038 109 119 s or 038 109 119 p are supplied."

[macquatic]

Thanks Crasher.
I was assuming that either was OK and the only difference was the manufacturer.