Bob... the CS 36Ts (and 33, 27 and Quanta 28) were designed by Ray.. The CS Merlin 36, 40 and 44 were Tony Castro designs.I met the designer once, Ray Wahl, I think was his name. He is a very capable designer and a nice guy. I always thought those boats were very well built.
Ray Wahl (Wall?) IS a great guy, came out of Camper Nicholson and was willing to talk to me about our (originally) Nicholson boat even though he'd moved on by then.
I doubt there'd be much difference between the two merlin models.. they are nice boats. At some point they added a transom platform, that's a plus if you're comparing two of them.