I honestly dont think there's a difference as the one I ordered with the later part number had a manufacturing date of April 2018...which is weird.

 

Thanks MarkyUK. Appreciated.
I am wondering if anyone else knows of any differences and if I can use a solid isolator with scratched shaft, to save myself the hassle of changing the full core?

 

I dont think the type of isolator is going to make a difference. The OEM one is sprung to (IIRC) reduce the strain/kick on the actual SC. The sold one will apparently last longer but may have a knock on adverse effect on other SC components

 

I just had my complete SC, C2Z32195, replaced. It was in for isolator replacement kit and the tech damaged the by-pass linkage. They never told me, but I found out when I got home. When the car was at the dealer I took some pictures of the old supercharger which showed no damage--they had no choice and went good for a complete SC replacement.

My 2014 -Dynamic-R has only 25K kms (18K miles). I would not mess with used salvaged parts when it comes to the supercharger unless you know the source or buy it completely rebuilt from a known source. I believe the torsion isolator was upgraded in the most recent kit. I would not reuse your snout with the damaged spindle.

Here is a link to my thread and problems with my dealer: https://www.jaguarforums.com/forum/x...racket-237053/

I also changed all accessible coolant hoses while the SC was removed, valley hose, back and front plastic 2 piece parts to upgraded 1 piece parts, etc.. To replace all of the hoses cost me about $1,000.