Attenuation characteristics are also related to capacitance. Capacitance increases at higher frequencies so attenuation will increase as frequency rises unless a higher quality dielectric is used. The better the dielectric properties the higher the VOP, the lower the capacitance and the lower the attenuation. Most RG6 is rated up to 2.2 GHz, so again I would assume that a cable that is sweep tested to only 1 GHz may be an attempt to make the attenuation numbers look better.
So again, two cables both with the same attenuation properties, but one cable is tested to a higher frequency, I would assume the one that is tested to the higher frequency would be better as it would more likely be a more accurate representation of attenuation for satellite use, and also an indication of a better quality dielectric.
Wouldn't that be correct?