For me, if you do a darkside, you name the trick as it would be from the side you are grinding on: ie dark true top porn would be like a farside back sav but with the back foot in a fakie fish. With a farside, you name it as if you are grinding the side you started on: Farside alley oop topsoul would be the same spin and foot positioning as a true soul, but coming from the other side.
So, farside assumes you are topside, darkside does not.
How many skateboarders does it take to change a lightbulb? One, but it'll take him 100 tries.
If darkside inferred topside as well the trick you're referring to would just be alleyoop darkside pornstar. Cause alleyoop darkside (farside topside) topside pornstar is rather redundant.
Also ttp & dark ttp are opposite spins. You name tricks by each step, like so: Direction of spin + darkside (or not) + topside (or not) + grind name.
link to said edit?
summer > http://vimeo.com/50059486
this whole argument is stupid
"You are a menace. A walking pestilence."
rob g did torque to farside alley oop negatives
Farside soul = farside soul
Darkside soul = farside topsoul = darkside topsoul
Ao or truespin I don't want to get into because so few people do those tricks who cares, but I'd probably go with what it would have been if you'd approached from the regular side of the ledge instead of farside (eg farside true soul on a foot wide ledge is like a true soul from the normal side of the ledge, but you just jumped over the ledge to get there)
Fish at 0:54
Farmer does a few darkside grinds in his too much love 2 section.