I have a little different comparison but both are from the same company. I recently uprgraded my Rega Planet with the Audio Aero Prima CD player. The differences on a very modest system are staggering, the Prima makes the Planet sound dull and congested extremely lacking in space and detail. I think the Prima is a real sleeper, I also own the Capitole Mk 2 and it's not that much better than the Prima.
I would tend to dissagree with Corby that you have to have a better system to appreciate the better player. I think it can be true with expensive cables for instance, but with the source, as long as your system is set up to sound as good as it can you will really apprecitate how much difference a better source can make. I am using the Prima with a system that costs about 500.00 used and am thrilled by the improvment the Prima has made