Another bump for an awesome lens and yes this is a copy of the SMC A70-210. I've owned both as well as the Tou/Five Star 70-200/4.
The first difference you'll note that alludes to the difference in design is that the CPC Phase 2 macros at the 70mm end whereas the other 70-200/4s macro at the 200mm end.

Here's a photo of the SMC A70-210/4 and the CPC Phase 2 70-200/4 side by side.