I've got a stocky's on a howa, I've got a sako 90 peak 308, cannot explain how far different the quality of two carbon stocks can be, you will never want a stocky's on a 90, the peak actually has a higher comb than tikka and it's negative as well, with quite a vertical grip, most probably wouldn't notice by looking at pics as still pretty 'sporter' in profile, bit of a sleeper, nicely done sako as it seems pretty modern in design, the sako is lighter than my identical tikka 308 chopped to 20" to match and recoil is way easier on me than that dang tikka, it's not a thing shooting a box with the sako but it's an every shot thing with the tikka just to explain the difference design and materials can make.
Having said that, that tikka may get rok one day but the sako stays as it is, nothing stocky's could make could compare to that sako carbon stock so it would be a downgrade, however...doesn't take much to upgrade the tikka stock, I actually like how it feels and with the pistol grip but from there back the sako wins with it's higher and negative comb, and the tikka material is pretty kicky also.