Does Sako or Tikka offer such options as a muzzle-brake or the BOSS® recoil-reducing device on its Hunting versions?

Muzzle Break for Sako/Tikka

No, at present neither Sako nor Tikka offer such features on their Hunting Models. Careful attention to balance and weight makes Sako and Tikka rifles ergonomic and pleasant to shoot even in the larger magnum calibers. An optional muzzle-break is available for the T3 Tactical and the Sako TRG 22/42 Models.