Both have similar set pieces, including the memorable staircase scene. It can be argued that Ju-On has more emotional heft to its proceedings compared to the Hollywood remake. The trade off is the American version having better special effects overall.
"Ju" is a concept. The idea behind this meaning of Ju is "to be gentle", "to give way", "to yield", "to blend", "to move out of harm's way". "Jutsu" is the principle or "the action" part of ju-jutsu. In Japanese this word means art.