I think they are the same in the rear but the front might be different. If I were you though, I would use plasti-dip matte black on your LR4 flares and it will look awesome. Provides a bit of protection from weather fade and light scratching as well on the trails but not the heavy stuff obviously.
Also, you can plasti-dip with the parts on the car which will save you a ton of time and effort.
You can pick it up (Plasti-dip, or spray on vinyl) at just about every hardware store now and its relatively cheap. About $8-10 a can out here in Hawaii. Then you can do the hood black out as well :wings:
Will the LR3 fender flares fit on an LR4 (2011)? Prefer the non-painted look