Theory about Fidelity Research MC & PMC Carts

I have a theory that the Fidelity Research MC 201 and 202 were the US market version of the PMC-1 and PMC-3. They were all produced from 1980 to 1984 and the specs on each look very similar.

Also, I have searched the entire internet and found no evidence of either the PMC’s being available in USA or the 201/202 being available in Japan.

Does anyone have any info to support or reject this theory.

Thanks in advance.