No. It is about your own preferences.
For me, having a trainer that is as quiet as a suppressed 22 LR is appealing, based on reports, I expect this to perform at that level on a 223.
The vegue "less than 130" is so they don't over sell it, seeing as the meters used are not reliable in the dB range in question.
Most people should just get a 6S, if you have to ask, just get a 6S. The 6S is a better balance of features, this is for someone who wants something specific and is willing to compromise to obtain it.
In my opinion, the compromises are not very significant, 1 inch and 2 ounces is far from a 9 inch muzzle forward can that adds 10+ ounces. Over time, the $200 price difference will be forgotten.