Arms:

uppercuts with force, while

hammer fists with lightning infusion.

's arm equipment seems to be more favourable against lightweights. One of the main reasons the latest (officious) Japanese Tier List elevated

above

is because the Upperdash Arm kills higher tier lightweight characters (LIKE BLOODY

,

AND

) more reliably (in addition to the arrow gimping).

, for instance, dies as soon as he hits 105% (or barely even that percentage) when struck by the arm, anywhere on an Omega stage (below the 105% threshold DI'ing will play a paramount role).

's arm is more favourable against characters that have poor recovery options and a single additional jump. Against

it's a solid move to get him off-stage, and force him to recover with his up-B, thus allowing the Pit player to exhibit some classy Orbitar-gimping :D
This latter option is a bit situational though. Also, to kill people with the Electroshock Arm, the positioning of the opponent plays a crucial role (imperative of it to be at either side of the stage, not in the centre), while

's arm will universally kill at a certain percentage.
Winner:
D