I haven't used the Bubs, but my dealer sells them as an option to the TORs. When I bought my bike they were selling Specialty Spares. They changed when they were getting backordered and Bubs made them a better deal.
I think the SS long slash cuts look much better than the Triumph or Bubs. One other thing, the Bubs aren't quite as throaty and are louder overall than the SS.