[c-nsp] Sup720 vs RSP720 - Difference?

[Buhrmaster, Gary]

> 			SUP-720		RSP-720
> CPU			600Mhz		1.3GHz

  CPU Arch        MIPS based        PPC based
                  SR71000           8548

(comparing cpu "effectiveness" between the two
architecture implementations is a more complex
evaluation than the frequency differences alone.)