It's not just the barreled action, though. The new MOAs come in a much better stock that is pillar bedded. I don't know if the action is glass bedded but, if it is, then that also contributes greatly to the accuracy of a rifle.
When you consider that the new stock with pillar bedding costs at least about $200, then while your regular stainless Vanguard is, say, $500, then even if you bought it and did the same work, then it would cost at least as much as the MOA, except with the MOA you get the MOA guarantee.
If it were me, I'd rather get the MOA over the regular SS vanguard.
And as for sticking with Savage........well........let me just leave that alone.
Zachary