Yeah mine were the original VCU/hangers & I only replaced the hangers 'just in case' but they were red rust inside after 5,000 miles where as the GKN ones I took off still looked good. Hopefully the GKN ones are well greased.I had a set supplied by Bell. One lasted about 10k, the other about 35k. The short life could have been down to alignment, or poor quality. No real way for me to know.
I did both today. Fitted GKN ones but didn't pack in any extra grease. I didn't want to move the seals.