Its easier to describe SA and SAW easier.
My opinion, but situational awareness is based on "whats around you and what is perceived as the biggest threat" Where Assessment is classifying the enemy in a range of biggest threat to no threat.
For example: Situational awareness - Your flying at 7k and only 3 cons in your view at 12'clock.
Situational assessment - All 3 cons are Spitfires, however only 1 is co-alt other 2 are taking off, only 1 is a threat.
Good post however, first lesson I teach in training arena is hoping people boost the SA up first, most newer players lack the SAW based on lack of knowledge, however over time they can learn from experience and SAW will grow, why we have website's like gonzo's