All Siglent DSO's capable of Bode plot
Apart from the bode plots, if you had to make a case for the Siglent scope vs. the Instek, what would you say to a prospective customer?
What does your scope have that the Instek lacks?
Many things.
It has 2 1GS/S ADC instead of one. It has more display modes. It has better vertical sensitivity. Web control.
Nico owns GW Instek scope, but a 2000E series that is nice little scope but much more expensive.
GDS1054 has some thing going for it and it is better than, say, Rigol DS1054, but not SDS1104X-E.
Truth to be told, I have been following discussion here and I think you might be expecting too much from a price range you are prepared to pay for. I don't think GDS1054 will carry you for years. Neither the AD2 is what you might expect it to be..
Excuse me for being blunt, but you seem to be asking unusual questions and seem to more be arguing and inciting adversarial discussion than really trying to get good information which will help you decide what equipment would be good for your use case..
And for some time now discussion has been going in circles...
You don't want to read datasheets but UI responsiveness is important. An intuitiveness, whatever that means..
You have no set application target.
You are a beginner and this is your first scope.
And then you want sophisticated scope although there will be years before you need anything more sophisticated than either GDS1054, Rigol DS1054, SDS1104X-E.
AD2 is not really "good" for digital except very slow stuf.
You cannot combine AD2 and any other scope with a software. It doesn't work that way..
Again, sorry for being direct. But my opinion that for a beginner you should start with any of the mentioned scopes. If this is a hobby maybe you will lose interest. If you are doing this long term and or pro you will need many thousands € for equipment in coming years..
If I were in your place I would either buy SDS1104X-E and SDG1000X AWG for more analog minded application or a MSO5000 if you are going to predominantly do microcontrollers robotics, motor control and such.
First option gives you great little scope and a 2ch real AWG and Bode plot that works really well. MSO5000 is not really good for hardcore analog stuff but has proper MSO integration and it also has 2CH AWG although very limited in amplitude and features.
If you overgrow any of mentioned equipment you will easily sell it and move on to better stuff.. Or keep it for reserve or whatever..