Going to have a lot to do with what you are setting for the cutting speed and step-over. Twice the step-over will half your time but leave a rougher surface. It can be worth it to sand that off rather than leave it to the ball nose bit to do the super fine cuts.
Carveco’s speeds are very conservative. Find out what your bit can actually do in the material that you are cutting. E.g if using the Jenny bits: Jenny 1/4 and 1/8 speeds and feeds from Cody's recommend chart - #6 by JDog