Listening to samples on the internet seems to be tricky. I know that my computer speakers are not good. If you contact Bill, I believe he may have a CD of the McFall he can send you.
I can tell you that my McFall actually has more volumn than my L&H Style 85GP pedal harp. And I know what you mean about the “something special” about the McFall. Bill based the design on a 100 year old James McFall harp he has. It has a ancient, Celtic feel that really touched my Scottish/Irish heart!
Please feel free to email me if you have any questions.