You can, it's just you'll get a different feel in different conditions. Wet weather tends to magnify performance and if one or other is much better / worse in the wet, it can make handling a nightmare.
4x4's it's often even more important as the diffs and sensors need the same tyres so if distributes grip properly.
Side to side is a definite no no though!
I've run different tyres front and rear for 12 months with no problems whatsoever, surely with any tyres they will feel different front to rear as you are running a different contact area (tyre sizes) and the power is going through the rear
have you run different sizes and had problems, is that why you posted that ?
to the OP , given the chioce out of those tyres..........falken
I'm not saying it is against all that is good in motoring to run different front and rear tyres. I am saying that it can make things unpredictable. Example - I had a set of Yoko A539's on a previous car (FWD) and when the fronts needed replacing they were out of stock so I bought some BF Goodrich. In the wet, the front had fair bit more grip which made my FWD car a bit tail happy. Once I knew about it, it was ok and I could drive to take it into account. But the first time it near chucked me across the roundabout! So, given the weight and power of the Zed, unless you're wanting to maybe create a difference in handling it seems like a risk to me.
Also, the manufacturers test and set up the cars with tyres as a constant - you might not get the handling characteristics you'd expect from the car with different tyres front and rear.
And I'm not talking about size, I'm talking about actual tyre brand / model.
I agree about across the axle, especially on the rear, different tyres is just silly.