Why were they on the track at the same time? The nose of the SM would easily use the nose of the SRF as a ramp. Note that the SRF was hit by a Miata that didn't see it. There are other videos on the web where production cars on the track with SRFs don't see and crash into the SRFs. The SRF is always the loser.
There was a big debate about this in SRF world a few years ago. In the period where SRF3 was coming soon they seem to feel interest in SRF wained a bit causing them to be grouped with production cars more frequently. It appears that has largely passed.
But wrecks occur in both classes...which is what drove me into oval track racing where a super late model is less than an SM or SRF, is purpose-built tube frame chassis with great parts at reasonable prices, built like a tank, and in spite of 500hp, less than 3000 lb, 10" wide wheels with 13" wide tires hit maybe 105-110 mph on a 1/3rd mile oval. And I already have the car. The track closed, then reopened...and we are talking about one track.