It seems to me that I've seen posted here from those in the know that the 168 is heavier in the jacket.
I love that bullet; its my go-to in the 06 over RS-Hunter as my one load for all big game. It's performed wonderfully both on paper and terminally.
I use 60.0 grains of Hunter in Remington cases sparked with WLRM primers for 2815 ft/sec MV. What's your load?
P