While every gun is an indivdual law unto itself, sabots seem to have better terminal effect primarily due to faster velocity and (depending on design) more efficient projectiles. It boils down to that combination which your gun, reguardless of manufacturer, prefers. However, the rate of twist should give you an idea of where to start.
Where lead bullets are concerned, bigger is better with those lessor velocities, and a 1:66 twist is for patched ball, and 1:48 is sort of a compromise twist, which could shoot ball or bullet, or either. 1:38 is about as fast as I would use for lead conicals, (ie: Maxi Ball, Buffalo Bullet, Great Plains Bullet etc.) and the 1:28 is best suited for saboted bullets from 240 grs > 300grs.
My inline is a 1:38 twist, and uses a 250gr SST saboted projectile, my 50cal flinter uses a 370gr Maxi in it's 1:48 twist, and my 54 cal 1:66 twist flinter uses a patched roundball. All three have dropped deer in their tracks, and all three resulted in my tracking the deer as well.
Sometimes insight and understanding are better to help in a decision.