The equipment I play on is very unforgiving. Pockets are 4.25 inches and the rails are on the jumpy side... can't really cheat the pocket, it's pretty much either you make the ball or you don't.
This means that when I aim parallel to the shot without compensating and I pocket the ball, then the CB traveled on the aimed path without deflecting. If I miss the shot then there was deflection.
If we go back to this shot:
View attachment 866952
With the 314-2 shaft, aiming parallel to the line of the shot with bottom left spin, I make the ball (black line).
With the CF shafts, aiming parallel to the line of the shot with bottom left spin, I miss the ball and it hits the short rail (dotted yellow line), meaning the CB deflected to the right.
If this doesn't clearly demonstrate that the 314-2 shaft is lower deflection shaft then I don't what will...
I believe that the fact that the wood is more flexible than the CF also contribute to this difference in deflection. Yes they tell us that it's only the front end mass, but still, something has to deflect to the side, either the CB or the shaft. low end mass and flexibility will work better I guess.