The "ego" described in this Seth session is what could be called the "outer ego" - the aspect of the greater self that is focused on this physical incarnation. This is different from the "inner ego" which is directed towards the vast inner reality. They're both seamless aspects of the same psyche, just looking "in different directions".
This "outer ego" is different from the unthinking ego described by Lazaris. That unthinking ego is similar in function to the keyboard and display of a computer - it takes data and displays it to our physical senses and is the mechanism that makes our choices known to the inner self that is manifesting our physical moments. Seth's "outer ego" is bigger than that I/O device (the unthinking ego) and includes the consciousness sitting in front of the computer that interprets the information presented by the unthinking ego and then makes choices and decisions which are communicated back through this unthinking ego. The reason Lazaris talks quite a bit about the unthinking ego is that choices need to be made and when we're "running on auto pilot" the unthinking ego can only replay previous choices which invariably lead to problems. This situation is much like climbing into your car and setting it on cruise control with the steering while tied down in a fixed position ... it doesn't take too long for disaster to arise!
This life is your chosen journey ... drive your car and enjoy the scenery!
"The word "ego" is much bandied about, and in many circles it has a poor reputation. It is, however, as I use it, a term meant to express the ordinarily conscious directive portion of the self. It is your conscious version of what you are - an excellent description, if I do say so myself. It is directed outward into the physical world. It is also aware, however, of some of your "unconscious" activities. It is the "you" you identify with, so it is as aware of your dreams, for example, as you are, and it is quite conscious of the fact that its existence rests upon knowledge that it does not itself possess."
(The Individual and the Nature of Mass Events, Session 822)