No such thing as a Wizard III, not sure what the person that told you that was smoking!
And by waht Nienturi meant, was the neck profiles of the RG, S and SV series guitars. The SZR and SA has different profiles.
On more specifics, the all prestige RG series guitars are Wizard neck, both trem and fixed bridge. Non Prestige models have the Wizard II.
The S series has the wizard II neck, but here's the catch. Despite the fact on paper it's the same as the Wizard II on the RG non No such thing as a Wizard III, not sure what the person that told you that was smoking!
And by what Nienturi meant, was the neck profiles of the RG, S and SV series guitars. The SZR and SA has different profiles.
The RG prestige models have the Wizard I, while the non prestige models make do with the WII neck.
Current S series models also have the WII, but here's the catch. Despite the fact on paper it's the same as the WII on RG models, the S series Wizard II is actually a different, chunkier and IMO less comfortable shaped neck. This has been a common complaint since the 22 fret S series were stopped being produced with the Wizard I.
Now the Wizard I is available on one S series, the S 5470 prestige, which has been a welcome thing for many long time S series fans.
The Wizard II is also on the X series guitars SV series, and there are 7 string variations of the Wizard Neck as well, the 7 string Wizard I and II.