Difference between these two:
Flight Following/VFR- When you are going to follow your flight plan to your planned destination. VFR is when you fly relatively low and rely on visual references like buildings, roads. THIS IS VERY COMMOM ON JET LINERS, DO NOT REQUEST OF YOU ARE A JET LINER.
ILS/RADAR vectors- Requesting ILS approach is when you want approach to vector you to and airport’s ILS (depends on airport). Approach will vector you to the ILS with an angle of below 30 degrees. Radar vectors is when an airport doesn’t have ILS, only GPS. Approach normally will not attend to this.