I have used both and stil do...I use supertape cc contours and st30...both work well with minimum cleanup...I am curious...did the name ST30 come from the manufacturer or is that a name applied by Toplace or Debbie. It's just weird you can't find it anywhere else. And no one else has it.. and as was stated earlier...they have to make more than one product. Whatever....They both work fine!! Cheers