Magnetic soundhole + Mic Combo Pickup comparisons?

[RandyOK]

I am interested in getting a Magnetic sound hole pick up with a mic combo.
It's hard to tell what these sound like when all the videos on YouTube are in different guitars and recorded differently,(some direct, some by camera mic or via a microphone on an amp, etc.) Is there anywhere that I could hear a direct comparison?
I am interested in one of these:
1. Fishman Rare Earth Blend
2. Schertler AG6 +S-Mic
3 Seymour Duncan AS6 Mag Mic
4. Skysonic Pro-1

It would be cool if someone had access to all of these to make a standardized comparison video.... I can always dream...