http://www.savagearms.com/firearms/models/
There are too many little variations between the various models to list them all....but basically the only major difference between the 11 and 16 is that as you mention, the 16 is stainless. The link above will let you look at each model in detail.
And yes....IMHO the Accustock is worth every penny of the $100. If you are not replacing the stock for a high end model (McMillan, Manners, etc.) it's a must. It will be more accurate than most shooters....and anyways, I get the impression you're a hunter, not a benchrest shooter looking for quarter inch groups.
Good luck!
Heavyweight
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