I've compared the Shotgun S1.3 to the Magnum M1.3. What they both had in common was a low noise floor and the ability to pass low level details. The M1.3 just did everything better - more low level detail, more holographic images, greater low end weight, etc. But what most set them apart was tone color. Colors were much richer and more fleshed out with the M1.3. Voices and instruments sounded more natural and lifelike. It wasn't suble either. After hearing the M1.3 I knew I couldn't settle for the S1.3. I ended up going with the M2.3.
I suspect you'd hear similar things moving up in the MA line.
I suspect you'd hear similar things moving up in the MA line.