I dont have much time on teh Sm7 yet. so far imo opinion, you set up and run similar pressures to that of SM^. I have heard peopl erunning very low and people running very high. We run middle ground 35-36. So far I have not seen the tire to be very sensitive to pressures, but I have not tried very high yet either.
I feel the SM^ was an easier tire to drive, the Sm7 has to be driven hard. It never feels as 'stuck" as the SM6 used to feel, but even so, it is often faster. I believe that you have to really dance the SM7 to get the lap times, it may separate the top drivers. I believe teh SM6 brought teh fields closer.
Jim