I don't see why EK would be responsible for ASUS ordering/using Aluminium WB for their motherboards. They probably cut corners and ordered cheaper material.
Now if EK supplied Aluminium instead of Copper on their own, that's another thing. But for now, I didn't read anything in that directon.
No, I read Q3 2015 is out of the picture and the CPU's wil arrive in late Q4 2015 or Q1 2016. That's why I wrote this info. You can check this info online via google search.
Did you saw any Skylake CPU's on the market? They are delayed in 2016.
So realistically it has no sense to compare who has what.
As long as the CPU doesn't use too much power, I don't care if it's made in 100nm techology :)