Maybe I am wrong. I just checked the Hammond manual. Looks like they are all there as well. So maybe its a difference of the controls and interface to the cabs. ??
7.3.1 – Amplifier Selector
Choose the amplifier for the Leslie. Like our AmpliTube and T-RackS Leslie plug-ins, you can mix-and-match different amplifiers with different cabinets to custom-configure your Leslie exactly the way you want. Choose between the model 147, classic 122, modern 122A, 3300W and G37 / Studio 12 Leslie amps or two tube guitar amps, the British Lead, based on the Marshall® Plexi S100, and the HiAmp, based on the Hiwatt® Custom 100 DR 103. You can also choose “No Amp” to remove any amplifier coloration from the sound and just use the rotating speaker element on its own.