Seriously i wouldnt say there was £120 of difference between them for £206 you get a very well made engineered bit of kit and you can also buy an extra baffle stack should you need it i find myself using my superdome on the .270 as mentioned and on my .222 .
Never compared them side by side but to me the sound reduction is quite good and its lightweight but you will always have a trade off when it comes to weight Vs Sound reduction
Out of intrest what cal you thinking of ?