You cannot compare the pitches of the two and expect them to be the same.......... There is some differences
I have run both.......... with the Concorde, there is a bit of Lag right off the bottom, with the skat it hits instantly, Is this a bad thing, I dont think so, there are plenty of skis with the SOLAS that hits well, you just have to compensate for it......... I prefer the Skat.........
SJBrit rode my ski after we talked about it, he said (In his British Accent!!!), "Wow, I really do feel the difference"...
I would not change props if you already have the SOLAS and it works....