...fanboy
Anyways, I thought this was all known aboout Grievous' past. he was an alien warlord or something yet was practically destroyed in a shuttle crash while in the employ of the seperatist, so they rebuilt him. He later modified his droid parts to make them look like a dangerous predator from his homeworld.
he wasnt using the force to walk.
he was using the force to trash the room.
and i have wondered the same thing. why not just cut off all
extranious tissue to make him genuinly more machine than man?
he would be quick and far less vulnerable.
but then you have to take midichlorians into account.
and then ill get into a bitter debate (probably with ush) about whether
or not the presense of more body tissue/blood/bone etc means a stronger
presence of midis. and im not going down that endless windy road again 😛
^ I'd say something more along the lines of "Vader is the best because he's a badass." 😛
Rampant Speculation:
At anyrate I think Grieves was more cyborgized than Vader because there's less left of him (heart, brain, eyes, possibly feet... wearas Vader had at least his head and torso intact). Also the design of his suit may be different because he was not human but some other alien species to begin with whereas Vader who is / was human had a more human-shaped suit.