Neal,
My experience with Saskatraz queens says they are extremely defensive. Another queen supplier that did offer Saskatraz queens reported customers experiencing the same extremely defensive behavior, so they stopped purchasing from Saskatraz. I personally have not purchased these queens, but have had to take ownership or manage colonies headed by Saskatraz queens. Unfortunately, these colonies were eventually euthanized. When bees from a colony follow me away from the apiary, in a moving vehicle, for more than a quarter-mile, it’s time to rethink their purpose.
Russian hybrids can also be in question because of their defensive behavior. So much of any honey bee queen expressed defensiveness is dependent upon where she mates.