Joey,CTE is THE MOST DISCUSSED AIMING SYSTEM IN THE WORLD.
CTE is certainly the most discussed aiming system on AZB, but I think very few pool players in the world have even heard of it. I have certainly never seen CTE in any published pool book or video, mainstream or otherwise.
Ghost-ball aiming (and other systems based on it) most certainly receives more attention and discussion. It is in practically every book every written about pool (although, it might be given different names). It is taught my many (probably most) instructors. And there are many (too many to count) aiming products on the market based on ghost-ball aiming.
The difference between CTE and ghost-ball aiming is that CTE has been discussed and debated for years and years, and it seems to become more and more "misunderstood" as time goes on. Ghost-ball aiming was perfectly clear the first time it was ever described and/or illustrated (probably many hundreds of years ago).
Regards, with respect,
Dave