As a long time user of Distanzia tyres, I would strongly advise you against mixing these 2 particular tyres, the Distanzia's have a complete different thread pattern, and a much grippier compound than a Pirelli, mixing these two can lead to an unsafe balance between the two whereby the rear tyre will give you a heap of confidence and the front tyre won't.

This can lead you into thinking you can approach a corner without realizing that the front compound could fail to perform as well as the rear one and you could slide the front tyre and come off.