Well for starters, Fluid XP+ is the only one that has any scientific documentation backing its claims not by just one but two governmental accredited independent labs. It is the only one that has actually been tested according to ASTM procedures for non-conductivity and the results are public domain.

Their coolants are the only ones that are triple filtrated before they reach your bottle and eventually that expensive rig that you have made. Their coolants are made in the USA and are quality controlled according to federal regulations.