I had an AICS 1.0 for a while. and currently have a .300Win TRG42. The AI stock is one Very Heavy dude, basically a stem to stern frame they hang the skin on. The Sako is much more adjustable and light weight. I like the design of the 1.0, but it is like a tank in the weight dept, w/0 the benefits.
The TRG action is, indeed, the TRG-S action except the dovetail scope mounts have different widths and the TRG has a solid topped receiver. The safety cut out on the TRG-S is not present on the TRG. You can use a TRG safety on a TRG-S, but not the reverse. Beretta sells bolt bodies. A TRG42 can be the ultimate switch-barrel gun, although to go from a magnum ctg to .308, you need another stock forend and magazine ($600) plus barrels, and bolt body *$185-$285).
The Sako stock design is definitely more adaptable, cheekpiece risers tailor your stockweld perfectly and allow lateral-horizontal shift that few other stocks enable. The buttpad is almost infinitely variable and can be used with an Anschutz butt hook.
The Sako trigger is really worth having. Extremely strong and ergonomically adjustable. This is the same TRG-S trigger, but with the housing the stock design requires. Did I mention the inside the trigger safety lever? Another REALLY BIG Plus for the Sako.
The Sako does not incorporate a recoil lug, the AI design won’t allow the lug to be bedded. It is supposed to be perfectly inletted not to require bedding. Such was not the case with the 1.0 I owned.
The Sako action is simply perfect. It is like working a jeweled mechanism, inspires confidence. The design allows a custom machined substitute if the operator requires it. Super nice to have the integral flange to screw the bolt handle to rather than relying on a tack weld or brazing job to the bolt body. I have heard of those failing also on Remingtons. If you need to clean the Sako in the field, takes 5 seconds to remove the pin. A Rem bolt with a Win70 safety would do that trick too, but those adaptations are a couple hundred more bux.
The Sako can actually improve once you need to rebarrel it. That would be fairly promptly if you choose a .338LM.
I bought my rifle to switch-barrel. I have an assortment of TRG-S sporter barrels and a .338/300 being profiled to match the heavy .300Win.
Beretta/USA is a substantial resource for parts resupply. They are in MD. Takes 72 hrs to get parts. Try that with Accuracy Intl.
If you don’t care for the TRG stock; McMillan, and Manners to name a few, can make you a more traditional design. But, I’m betting if you try the stock, invest the time to make it fit you and live with it for awhile, you won’t make a change. But maybe you will fork over the $1600 for that wicked looking folding butt stock?
Accessories? They are there for the TRG22/42. But so are aftermarket makers. If you want the best Picatinny rail (for either rifle) you’ll contact Richard Near. A Harris Bipod is a super choice and won’t scratch your barrel (get the optional rubber bipod foot covers if you go Sako for bipod). Iron sights are out there from many HighPower apperture/micrometer makers. Do you need the big-ass muzzle brake? Maybe? Do you need that 27" barrel (30" w/brake)? Maybe not. Anyway lots to choose from, and they are available.
I admittedly have not fired an AWCS AI gun.
I am not keeping the 8-32x NightForce NXS scope because this rifle cry’s out, “carry me!”. Put a 24" sporter bbl on the platform and a 1.5-6x Diavari and you really have somthing.
The Sako is The One, if you could only have one.