Lets just ask few questions about new SDS1104X-U to Siglent experts. I don't have the scope so cannot test myself.
I am not expert but I still answer.
1. What can you do with segment/history frames. (Rigol cannot do any of this)
-Can you play them back with persistence to get envelope of all captured frames ?
Yes and no. It can automatic playback backward and forward direction with selected speed and when speed is enough fast it also produce intensity gradation.
During playback it works like DPO. But it is not just as fast even if turn playback as fast as possible.
There can use intensity or color gradation and select what interpolation use or not at all.
It do not have settable overlay stack for sequential acqusitions so that it can overlay (stack) all segments in history to one screen. (This feature what have some user settable parameters is wished from Siglent. Looks like it is not in highest priority level in to do list)
As far as I know in fast sequence mode when sequence is ready it leave all segments stacked (overlay) on screen until user do his next selection or if it is in continuous mode it start new sequence. Least in X-E models and afaik this works mostly like X-E.
-Can you decode from them ?
Independent of if they are from normal acquisition history or after fast segment acquisition in history buffer these can decode.
It means that you can trig separate messages and even if period is slow these can capture to history buffer just as they exist and then afterwards individual acquisitions can decode. All what are in history buffer have full data just as in normal acquisition memory. (Added with relative time stamp. There is not RTC).
-Can you enable measurements on history frames ?
Of course, fully and with full resolution. Including also FFT and math.
2. Does it have Measurement trend (Rigol has that)
No. Only normal statistics.
3. Does it have CAN/LIN (Rigol doesn't)
Yes it have, just all what also X-E model have including 2 separate decoder (fullduplex).
4. Does it measure over full captured data (Rigol doesn't)
Yes and with full resolution including also waveform history buffer.
In this place I will also add that all interpolations are fully post processed and can always change afterwards including history or stopped scope. All is based to full raw ADC data in memory, in runtime and afterwards in acquistion normal memory and in history memory.
5. Does it has better/faster msk test. Those are very useful sometimes.
It have hardware based full speed mask test and test result do not affect speed. What is current normal wfm/s speed is also mask test speed and it do not affect wfm/s speed. Also mask test signal output (pass/fail) is full speed.
6. Does it have detected peaks table in FFT? Is it sortable? (Rigol doesn't have it)
Yes. 10 automatic peak markers. Is it sortable? I do not know what parameters user can give for search peaks or arrange order in table.
7. Does it have search function? What can it do? (Rigol has none)
Yes, some search. I think it is best to read from User Manual. Not easy told by ten words.
But can not example search decode result data.
8. Is 1mV/div real analog range. (Rigol has 1mV/div by zooming in software from 5mV/div)
Yes, afaik.
9. Does it have color grading display? (It seems to does, Rigol doesn't)
Yes of course.
Most normal things are just same as in X-E models. Even User manual is same.
Dropped things are all Optionals. 500uV/div. Web server. BodePlot. 1ns/div time scale. Now minimum is 2ns/div. Other USB port dropped from back side.
Reduced things are Double ADC Double memory is now single ADC single memory. Now it is 1/2/3+4Ch in use 1GSa/500MSa/250Msa/s and memory goes 14/7/3,5M.
FFT memory length reduced. It is 1/8 from E-X model. Max is now 131072pts (128k). Other ways FFT works same.
History, fast sequence, measurements, decode, intensity and color grade all same. Also wfm speed same and so on.