The Spectra has a longer barrel and better trigger (especially the DA) and shoots bit smoother but this was after one session didn't compare side by side. Slide to frame fit and overall feel comparable to Redback. Then you know the level!
Shot one today (Spectra) and bought it. Will arrive in 2 weeks (after permit papers okey) keep you posted. Trigger better than a tuned Shadow 2, DA amazingly smooth. Fit and finish is the best I've ever seen.
Ive seen and hold them at the Xtreme Slovakia, they are very well build and tight. Many pro's already used them. I loved them. They're like a better Shadow. Actually this company builds all Shadow oranges! So they know what they do!