Sean says the incline and twin are almost identical and the fsr of the twin is better rather than the vsr for carving.
Sean says
"The Knapton was originally called an incline twin. It is almost the same board. The primary difference is the centered versus offset stance. The incline is available with a variable sidecut radius and a single radius sidecut."
Ryan however is very gushy about the flux and the incline when he tests them on his videos.
My twin has been delivered but not used. I could probably sell it for close to what I paid for it and use my Proto 2 this year and then get a directional which to be fair i thought Sean would have recommended as I made it clear I don't ride switch.