1052E from Rigol is much inferior to 1202X-E and 1054Z was almost 80-100 USD expensive for me including shipping. I steered away from Hantek and didn't had budget to explore Keysight 1000x series.
Rigol 1052E have nothing to compare with Siglent. It is so extremely far away from this class. Of we look The Oscilloscope performance also Rigol 1054Z is just like total toy if we really talk about oscilloscope performace. Only what this Rigol Z box have over Siglent 1kX-E (or Siglent 1kX/X+) is count of channels. But if we look performance it is reality that Siglent is far over. Just fef points: Rigol total crap Sin(x)/x joke just like in total toy. Siglent works in this thing like professional test equipment. Rigol analog front end. Highest true sensitivity is 5mV/div and noisy as hell. Siglent 1kX/X+/X-E full BW full resolution 500uV/div.
Siglent have real time continuously bacround working waveform history buffer (up to 54M).
Siglent have true fast Segmented memory acquisition (in X-E model measured quaranteed maximum speed well over 490kwfm/s (segment/s) (measured, not only manufacturer claim)
Siglent have full speed hardware based mask test.
Siglent X-E (with this early FW) have around 88kwfm/s max continuous average speed and up to 100kwfm/s peak speed. (measared - not only manufacturer claim)
Siglent have separate channel vertical adjustments.
Siglent have max 10Msample FFT.
Siglent X-E have over 200MHz bandwidth. (note: with two channels on, samplerate is 500MSa/s for both channels. Nyquist "wall" is just 1.25 * 200MHz (same if Rigol Z box is used in 4 channels mode and 100MHz). It is just barely borderline enough for some purposes but it need user attention and understand some adverse effects.
Siglent automatic measurements accuracy/resolution is very extremely far over both these named Rigols, specially if take Siglent SDS1kX-E.
How about Keysight 1000X
I think Siglent can write on Siglent AD: "Scrap out toys and take real The Oscilloscope"
(but this is not so clear in all things, not like with Rigol's. But with extremely useful Wfm history buffer and with extremely fast Segmented memory mode Siglent walk hands down circle around this Keyshit 1000X when it try running as fast as it can. And if Keyshit 1000 X have as noisy analog front end as Keyshit some 2k models... ) But if we go to UI and some firmware things. Chinese (of course also including Taiwan island) need still continue developing themselves lot of - includind some things in inside house working culture.