With the risk of repeating myself, and not answering your question: I have compared MinMASS with my home-built JohnH attenuator, together with SV20. The JohnH sounds far better, so yes, you can get better sound. I have no experience with Ironman, though.Has anyone compared the Weber Mini with the Iron Man mini.
I use the Weber with my SV20 but wonder am I getting the best out of it at home.