Hmm. Yes, I'm sensitive to the difference between Hibeams and Lo Riders from DR. The Lo Riders are far to stiff for me to enjoy playing.As a regular user of GHS Pressurewounds, I kind of doubt that's what you have.
They're anything but "trebly" in their tonal character and they're stiffer in feel than typical rounds of similar gauges. Descriptions such as "snappy and stretchy", "fresh and trebly" and "much lighter and bendy" just don't match their character.