What is the difference between this and...
What is the difference between this and Sterling's Evolution Kosmos Bi-color Dry?
What specifically does it mean that this is recommended for "Gym Use"? (sheath material? elongation %? etc.)
The Bi-color Dry has a different color pattern on one half of the rope than the other to tell the middle point and the dry just means it's dry treated to prevent moisture erosion. I wouldn't necessarily limit this bad boy to gym use, I own this rope and it has served me well on many outdoors excursion of mine and I'm sure it will on the excursions to come.