The Octopus is limited to my opinion why because
The Huntron has 3 different test signals AC waveforms 60hz, 400hz, 2000hz
It also has 4 different ranges from 10volts to 30 volts
It also has a Pulse generator to set transistors , FETS, Triacs, SCR
You can track down shorts on busses, IC vcc to ground , etc
The thing about curve tracers is that they have a built in step generator
But there is still no Measurement Markers to measure the current value and the voltage value, I like having those measurement markers like what DSO have and Digital O-scopes
Curve tracers don't have those , so it's just a visual tool , just like the huntron has no measurement markers either