IME Compass tire flats were almost always due to tiny shards of glass working through the tire over the course of a few rides or tiny steel wires (the "michelin thorn").
Using sealant in my tubes and then eventually going tubeless completely stopped these flats. Tires feel faster but the weight savings are so small I would not put much stock into that as it's probably just placebo effect.
4. Other Panaracer offerings are not as supple in the sidewall as the Compass.
Having handled a few different tires from the different re-badges I think the sidewalls are more similar between all the tires than the tread area. Compass tread area is much more supple in the hand that any of the others and when testing different pressures it seems the sag is caused quite a bit more from the tread than the sidewall. I haven't gone as far as measuring the contact patch at the same sag % but it would not surprise me if there were vast differences there as well.