Legacy frequencies FM
Wireless CAB-1 to TMCC Command Base at 27 MHz
Wireless CAB-2 to and from Legacy Command Base at 2.4 GHz with 9 different channels is equivalent to 2400 MHz or 100 times more hertz or signal that moves through the air than the CAB1.
455 kilohertz to track
8 or 9 bit digital signal - 8 bit TMCC engines, 9 bit legacy engines only.
32 speed steps cab1
200 speed steps Cab2
Nothing is stored in the cab everything is stored in the base.
No overlays needed on cab2
the above is how I explain the differences. got this a while ago from one of the york legacy seminars.