Between the two of them (if we are forced to choose between just them), I'm more inclined to target spiesr, if we take their own accounts for their role to be true. If spiesr does fulfill his win condition, he might be removed from the game as a winner, and that'll lower the townies' vote count further. On the other hand if we take spiesr out first, soundman will still be around to contribute to the townies' vote.
spiesr is not town anyway, so you can't see his vote as a townie vote. Also, if you look a bit the video; christmas is about to get spoiled because it is too hot ad there is no snow. Mrs Claus goes to see both misers and tries for a bargain; heat miser lets just for christmas his brother snow miser make it snow in the south while he is allowed to make heat in the north pole as a compensation.
This whole game is about not ruining christmas and flavourwise, the fact that it was too hot and not snowing was ruining christmas in town. And the bad guys here all about ruining christmas.