Quote from Fender:
"The Cyber-Twin uses Cybernetic Amp Design (C.A.D.)"
Modelling amps use "digital snapshots of the amps they are "modelling." The Cyber-Twin doesn't.
For instance the tone stacks, take blackface, tweed, and dynatouch amps. Those who have used these amps know that the knobs act differently. Like turning up the Bass knob on a blackface will effect the sound one way but if you turn up the Bass knob on a tweed amp it'll effect it a different way. With the Cyber-Twin, if you choose blackface tone stack the knobs will act and preform like blackface knobs. Change the tone stack to tweed and the C-T's knobs act, respond, and preform like a tweed amp's knobs. The same goes for dynatouch and HMB (Marshall's Bassman copy.) And I haven't even gotten into the drive circuitries yet. Once you choose your tone stack, you can choose your drive circuitries (12 tube types and 4 solid state types) and you can place the drive circuitry before or after the tone stack. With the Cyber-Twin the guitar signal goes through analog configuration of resistors, capacitors, etc.. In essence, the Cyber-Twin does not "model" an amp, it becomes the amp. I know that sounds crazy, but that's what it does.
Sonixx, I'll put it this way.. The C-T is Fender's answer to modelling amps like Line-6. But IMO, it's on a different level.