Spectra and Dyneema are the same stuff. "Spectra" was/is the name used in the US although "Dyneema" has come into use in the US now. Suspect the problem with the "Spectra" trap lines was the use of the the lower strength material as Wouter noted.

Believe the A Class and, possibly, F18HT and/or Tornado classes use line rather than wire for trapezes. A post in the General Forum may generate additional responses.