Have experienced OEM v's EBC on a 2007 model, my first RT.
The original (OEM) pads didn't last long and wore unevenly, can't remember the mileage. In my naivety as a virgin BMW owner, I thought, I'm not paying that price for BMW pads.
Tried some (half the price) EBC HH pads, they were useless, no initial bite or feeling, chucked them away & got some OEM ones again.
I seem to remember having the discs changed under warranty, once if not twice, something to do with the way they mounted to the wheel. (This had nothing to do with the EBC pads.)
Now, when cleaning/servicing the pads/calipers, I check the wear on the pads, if uneven, swop them around from inside to outside & vice versa on the same caliper.
The brake pad friction material thickness (min) is 1.0mm. If a close eye is keep on the pad thickness, they should last a good while longer than the current 17K miles.