TCCD = TCC5. same chips, same manufacturing. only difference is TCCD was speed binned by Samsung, which they stopped doing. Now they just release only TCC5 that are proven at 200mhz, but many have gotten their TCC5 to the 300mhz barrier. I'm a total n00b at timings and all the RAM settings and i got my first pair going prime stable at 280mhz.
I do frequent the OCZ forums, and what they say makes sense. The PC3200 Plats will be guaranteed to 2-2-2-5 at 200mhz, and if you want a guarantee it will go minimum 250mhz, or 280mhz, or even 300mhz, buy their more expensive RAM. If you buy the PC3200 (just like when you buy a 3000+ Venice), more often then not you will hit high speeds, but if you can't break even 230mhz (or say 2.4ghz on a 3000+ CPU), you can't really complain since overclocking is luck of the draw.
besides, what other options are there out there? TCCD are no longer in production, and Winbond need so much juice and even then can't go much past 250mhz, so if you have a 3000+ and are shooting for HTT of 280 to 300, your ram choices are limited to Samsung.
regarding the DDR2, I guess thats why AMD users are frequently in the 7,000 to 8,000 range in Sandra memory bandwith, while DDR2 Intel users are proud of 6,000+. AMD was smart by waiting until DDR2 got some half decent timings before migrating to them.