I have had both. My experiences were that the cardas was a bit slower, not in a bad way, and provided a mellow presentation that made you want to listen to your rig. Cardas Golden Ref has an evenhanded presentation. They projected a nice soundstage with plenty of depth. Not the most resolving cables, but you will hear all that is there, but it will not put it in your lap. The Analysis Plus Golden oval had a rightness to the timbre. Their soundstage was a bit wider than that of the CGR. They also projected a bit better depth perception. Their flaw was I felt they were a bit closed in on the top end. Also The Golden ovals were very good at resolving detail. Their bass attack was not up to the Cardas GR. But again the Golden Oval's midrange had a bit more bloom and Air. Both very fine cables. They tend to add a little more harmonic coloring to the signal but in a very pleasing manner.
Hope this helps,