I own the Woodpecker and Seneca parallel guides.
The issue I had with the Woodpecker system was arm creep, you had to be aware that the segments would separate after repeated bumping of the material to set them in place. I also found the stop itself would creep.
The Seneca set I could never get calibrated 100%, most likely me.
I have used the Festool pg’s. Never bought a set because they really never impressed me.
One of the really nice thing about TSO’s system is if you have a long arm on the rail or multiple stops you can unsnap the clamp on the GRS and slide the entire assembly off the rail. Remove the cut piece, reposition for your next cut, slide the GRS on the rail, lock it in place, potion the assembly make the cut. This reads like a pain, but compared to moving a rail with a long arm on it this is a dream.
There won’t be any segment creep because there are no segments. The stop locks in place well. Scale and pointer are very easy to view.
This system is more accurate than my sliding table saw.
Tom