I have been working through the datasheets, user manuals, etc. for each of these units. There are a couple of specifications that I don't fully understand, and don't understand how to compare between the units:
History, waveform recording, sequence, memory depth - I'm not sure if some or all of these are the same thing, or if not, how they relate to each other. The Rigol specs are 25Mpts of memory depth and a max of 500K of frames for "hardware real-time waveform recording"; meanwhile, the Siglent specs are 50Mpts of memory depth and a max of 80K frames for "History" - but also adds up to 80K of "segments" for "Sequence."
Waveform update rate - the Rigol says up to 30k "vector mode" and up to 1M in "UltraAcquire mode"; the Siglent says up to 80K "normal mode" and up to 500K in "sequence mode." Do "vector mode" = "normal mode" and "UltraAquire mode" = "sequence mode"?
For either of these, presumably more is always better ... but how much difference do they make in actual usage, and when / where do they make a difference?