At the moment, I'd pick Rob Miller at 15 every time.
I feel that Minozzi is a better broken field runner, and is likely a bit quicker than Miller (who is no slouch).
However, I believe that Miller is a better defender and better under both the high ball and attacking the ball.
But crucially, he is excellent at running a good line, at pace and overloading the opposition.
Given how much we're struggling at the moment, I'd much rather have the better defender, and the better option at attacking high balls.
If we get back to a position where we're defending better in general, then I'd probably choose Minozzi as he's probably the better counter attacker.
As an aside, I'd also consider Minozzi ahead of Kibirige on the wing.
I'm not a huge fan of Kibirige, and then Minozzi/Miller could rotate at full back if one is counter attacking