Streetmaster 318 vs. Performer for street use

In conclusion which has your personal preference for a fun little street machine?

Where does the performer top out? I just can't decide. I'll keep runnin the Streetmaster for now 'cause it's on, winters comin' and I've yet to find a deal on a performer if and when I do I will snatch it up just to see when I have some spare time if there's a difference.

Topped out @6100rpm on a 318 w/340 cam+4* w/140psi cyl pressure and stock 67 closed chamber 318 truck heads and headers in 4 spd 3.73 geared valiant.
It would just shut off @6100, plenty or rpm really, and what the cam was good for.

If you have an automatic, I would consider the performer over the streetmaster, but thats just me.