Differences in muscle uses

[BrianJohnston]

Is anybody able to accurately describe the differences in "which" facial muscles, and or "how" muscle use(s) between the following:

• High Range
• Stabilizing the low range
• Soft Dynamic long tones

I definitely feel a different burn between the three when working them out. Curious to know if there are different muscles being used, or the same muscles just being used differently. I think it's mostly out of my own curiosity to know, but it could also be helpful to myself and others.

[Doug Elliott]

I would say it's the same muscles used with different intensity.
Or at least it should be.