Complex sentence: Joan's Full Plate only reduced her mobility by 14% and deflected a blow from the Norman broadsword while William's chainmail hauberk reduced his mobility by 27% and was pierced three times by the Arming sword.
Split into simpler sentences: Joan's Full Plate only reduced her mobility by 14% and deflected a blow from the Norman broadsword. In contrast, William's chainmail hauberk reduced his mobility by 27% and was easily pierced three times by the Arming sword.