Mainly, floating bolt head...
And, their accutrigger is good enough for 1k OTBox. Don't get me wrong... My Timney works great but the feel that remington should address this in all guns.
Also, savage has a to. Of aftermarket support.. But really, all you are looking for is chassis compatibility.
I like 308... Many competition guys are going to 6.5 creedmoor or 260rem