I have the CA-2200 and did have a CT-2300 delivered to my house for a week of listening. The amp was broken in and the CT-2300 is the same as the CA-2300 but different cosmetics. For my ears and in my system I prefered the CA-2200. The 2200 is bias closer to class A, ran hotter, had more midrange bloom and depth and was a little less critical. The 2300 had deeper and more solid base and reached higher in the treble. It sounded very nice as well and was perhaps a more well rounded amp. I have also spent a lot of time with both the Sophia's (II and III, wonderful speakers) and knowing their sound, strengths and capabilities if I had to choose from a CA-2200 or CA-2300 to drive the Sophia III's, I would choose the CA-2300. But ideally I would want to hear them first. Hope this helps.
