Old Ceraballs vs New

Can anybody tell me what is the difference in the two designs

Are the new ones significantly better

Do these work well placed under power conditioners
The new ones are significantly... available. I looked around and couldn't find anyone stocking the old ones.
I use mine under my speaker cables (the old ones). There is a review written by Roy Gregory from HiFi+ (UK) on Finite Elemente web site, where he briefly compares the new vs old ones.
I appreciate the responses thus far
Anyone else care to comment

Are the Ceraballs effective under power conditioning units