Is there anyone that's clued up with Sachs parts?

Im in the process of buying a new Flywheel & Clutch and came across a performance release bearing on the Aftermarket.zf.com & ******* site>>
******* price -
Performance releaser: 043151271937. £70.96
Std Releaser: 3151271937. £13.88

I've just had a reply back from Sachsperformance.com and they state that the release bearings are the same. The difference in price suggests otherwise as that's one hell of a price jump if they are the same!