Indeed it's generally true for thicker strings at all pitches, though perhaps more so for lower ones for this case. The longer the strings, the better the sound

Indeed it's generally true for thicker strings at all pitches, though perhaps more so for lower ones for this case. The longer the strings, the better the sound in general, too, for related stiffness-timbre reasons. Even a tall upright you can tell can sound better than any short upright, and Grand pianos take this to greater extremes of length.