Originally Posted by Homemade WRX
[slams head into wall]
they are all crossdrilled!! The only differences being
left = 79mm stroke
middle = double crossdrilled with oil timing altered 45 degrees (like all newer EJ20 cranks) and nitrided (Spec C only from the factory)
right = same as 'left' crank but with 75mm stroke (same as 'middle' crank)
That's sort of correct...
The left and middle crank are rear thrust (from rear thrust block) and the right crank is centre thrust.
Apart from that what you say is essentially correct.
The photo was to illustrate the double cross drilling and 45 degree phase difference as well as the factory nitriding.