What about performance of VIC Scale Unit

The Video Image Compositor (VIC) unit is suitable for use in mobile systems.

What is the difference between VIC and GPU/CPU scaling? How many way scales are VIC supported

VIC is an individual HW. It is independent from GPU. The performance depends on the resolution. Here is a usecase:

You can try how it works in your usecase.

The VIC uses less power for the workloads where it is suitable and sufficient.
The GPU is much more flexible, programmable, and uses more power.