Any difference you felt is due to how they were braided and coated (or not coated). LPG are my softest lines because they are not coated. Skybond are very stiff because of the waxing yellow coating. Both are Spectra. Matrix lines are somewhere in between (but closer to Skybond) and are not Spectra trademarked material.
It’s nice enough for a while, but mine wore quickly and got pretty gritty feeling. I prefer both Laser Pro Gold and SkyBond. Matrix is better than most cheap spectra line sets, though.