I’ve been growing the blight resistent potato Sarpo Tominia every year since 2004 and it’s still going strong, showing no sign of lack of vigour, continuing in full growth right up to the first heavy frosts with fantastic yields. In the UK, this variety was deemed too similar to Sarpo Mira to be continued. However, my observations are that Tominia yields a bit better than Mira here, probably because it is a bit earlier. This makes little difference in the UK, but could be significant here in Norway where growth is stopped by early frosts. 
Norwegian Seed Savers (KVANN) administer a national program offering 10 virus cleaned varieties from our national list of some 80 traditonal varieties each year. Members are not allowed to pass these varieties on to others, but can save their own seed potatoes. This is to reduce the spreading of virus and other diseases. We will reoffer most varieties of interest after some years.  For the same reason we have also included other popular non-commercial varities in the program and Sarpo Mira has been included for some years now. Members are sent 3 mini-tubers of each variety and these are then used to produce seed potatoes for the following year.
We will now be including Sarpo Tominia in the programme and hope to be able to carry out comparative trials between these two varieties in a couple of years. Here is my harvest yesterday. These were grown in a very shady part of the garden with maximum 1 hour direct sunlight in summer and none when the tubers are forming!