The licensing and sales structure have to be different:
"Ideal Flight 10 Professional" is for the professional simulator P3D.
"Ideal Flight 10 - Special Edition" is for the entertainment simulator FSX/FSX-SE.
">augmented - Special Edition" is an upgrade for Ideal Flight 10 - Special Edition for FSX/FSX-SE.
IF10 Professional contains the full IF10 + >augmented feature set, and installs alongside IF10 as a separate application.
Also:
The regular "Ideal Flight 10" is being withdrawn from sale, and replaced with "Ideal Flight 10 - Special Edition", the only difference is that it authenticates with the flight1 e-commerce servers rather than the codelegend.com server.
The original ">augmented" will remain on sale for those that have regular IF10 and not yet upgraded.