Ware talking about different kinds of planes.

The Seduction FunFly, WildStyle, and Diabolic are fun-fly kind of planes, similar to the profile planes. They are not meant for precision flying but can perform wild and slow 3D manuvers.

The Seduction FreeStyle, Demonstrator, G-Trick etc are new generation IAM-style planes that can complete the F3A schedules as well as fly freestyle/3D routines. They are basically still pattern planes, modified with large control surfaces and larger side area. These fly with precision and constant speed, but can also do the 3D stuff on high rates.

I think guess it depends on what kind of flying you want to do when choosing between the Seduction FreeStyle or the Diabolic.

The Demonstrator is a special made plane. They are still taking orders, but I am told by OK model that there is at least a three month wait. They build each per order. You can find the order sheet on OK's website in Japan (Japanese).