As I look at the aftermarket for rotors, I notice some state "Left Rear" or "Right Rear". Aren't they all the same or is there a difference front to back, driver's side to passenger side? If so I have no luck finding a full set.

 

They are not handed , ie a L fits on the R and vv ,
How ever the fronts are larger , significantly larger ( and this is reflected in the price ) than the rears ,
You cannot swap F + R .
So you need two sets , a front set and rear set .Mr Google is your friend .

Its an easy enough DIY job I did a couple of threads on here .

 

Just a guess but looking at your screenshot it shows drilled rotors which I imagine need to be fitted in a certain way so the drilled holes maximise cooling.

 

I don't think they do, you know. Certainly I never recall having handed rotors.

C

 

As others stated, doesn't matter.

Thank you by the way John F., I used your writeup when replacing the rears recently.

Perhaps they are setting up the direction of the 'spirals' of the cross drilling to be facing the same direction. As these are to allow hot gasses between the pads and rotor to escape (or liquids in the wet, which become gasses at temp) the "aerodynamics" of the holes should play no significant part other than aesthetics.