I believe it depends more on the quality of the bullet and the accuracy it provides out of your gun. All three will effectively take a Whitetail, however, they must hit home with accuracy.

Barnes are an excellent premium bullet.
Hornady XTP's will work fine and are much more cost effective.
Harvester Scorpions come in 260 and 300. Both are excellent.
Speer Gold Dot's or Deep Curls ( same bullet ) are hard to find but very good.

Find the sabot / bullet combo that shoots well and hunt with confidence.