If you have money there is the Accuracy International AXMC, PGW Timberwolf and Sako TRG. These are the big three.
All very nice rifles but there is one area where AI outshines the others and that is the magazines, 10 rounds double stack even in .338 the others are single stack. Besides that, its apples to apples.
With the AI you can change your own barrel but while this works out great down south, here in Canada you have to order in your barrel from the distributor and this takes time. PGW has the advantage there, they are in Canada so they would have a quicker turnaround time for getting your rifle re-barreled. As far as I know getting a replacement barrel for the TRG is not that easy here.
Both AI and PGW have a bolt mounted safety (win 70 style) the Sako's is trigger mounted. Sako and AI are 60 degree bolt throw PGW is 90 degrees.
Those are the key differences and they are all top quality firearms. You can't go wrong with any of them, they are proven systems, very reliable and accurate. The Sako TRG is the most affordable of the three.
Pic of AI mags, 338 and 308.
For optics: S&B, Hensoldt, Nightforce.