I'm not convinced about this whole mismatching tyres scaremongering.
Does this mean that if you wear out your rear tyres twice as quickly as the front, which you will do on a zed, then you need to replace all four tyres to make sure there are all exactly the same?
If the answer is no then what is the difference to running different branded tyres on front and back. You can never have all 4 tyres the same!
I'm not talking about having different brands on each side of axel but I really dont see a problem with different front and back.