Owning a TRG22 and 42, the muzzle brakes are the same. I interchange them and the hole in the brake is bored out to work with the .338 which means it's fine for smaller calibers.
I also run it when I swap barrels to 260 which is pretty close to the 6.5 in recoil. Honestly, you'd have a hard time telling the difference in recoil between the TRG and even more aggressive brakes. The videos online show the TRG brake works about as well as brakes that vent a lot more gas and noise back at the shooter. I tried an after-market brake and had a hard time telling any big difference in recoil to want to switch. Even worse, the after market brake opened up the groups where the TRG brake did not for my load.
Design-wise, the TRG brake is made to send more gas upwards and sideways than downwards to prevent dust from forming around your shooting position. It can be installed and removed easily by the end user.
The one downside to the TRG brake is that it's a little wider diameter than some other brands if that matters to you. It's not as trim as others.
I time the brake and put a mark on the barrel and brake with some paint (or you could use a carbide scribe to mark the metal). That way you can pull the brake off for cleaning, etc. and put it back again. You could also mark the clamp bolt the same way so when you tighten it you get it back to the same torque (or use a torque wrench). Like most all the components for the TRG, they are a little pricey but are well designed and work together in a nice package.