The "VC" in 1 and 2 stands for "vector control". This is closed-loop control of the motor as opposed to the open-loop V/F (voltage/frequency) control of 3.
As to the first letter, different companies use different terminology. "S" is probably for "Space" as "Space Vector Control" is a term often used. "F" may refer to "Flux".
Usually, the biggest difference between different vector control algorithms is whether they use a shaft position sensor or estimate the shaft angle from various electrical properties and a good mathematical model of the motor. You will probably have to consult the VFD mode to see what they are talking about.
It's simulated and full vector control for 1 and 2. Full vector control require a shaft encoder $$$. Modern drives have good torque characteristics in simulated vector but if you're using the drive for a hoist or need best low speed performance you'll still need an encoder.
V/F is volts /frequency. It's the simplest control format but has poor starting torque. It's acceptable for small fan and centrifugal pump applications.