Differences between SIP pipes

Can anyone tell me if there is any Torque/Horsepower differences between the following:
Racing exhaust „EVO“ SIP for PX200
and
Racing exhaust „Performance“ for PX200

I am looking for higher torque at lower RPM, my PX will be fitted with a standard crank Pinasco 215 kit with worb5 head.
What I want to avoid is a pipe better suited to the high reving Malossi kit.

I have seen a few Dyno results and so far it is pretty even between the RZ EVO and the SIP, if I go with the SIP pipe, i’m not sure what, if any is the difference between the two models available.

Thanks

Richard