GPP-4323 from GW-instek ... Ethernet is optional.
HDP4424B from Hantek it's the same price as owon, it seems more polished ...
It seems that Instek made Ethernet standard at some point recently. You might want to double check with your supplier.
That Hantek looks well thought out. They placed the select and enable buttons right over their respective output terminals, which is how it should be done.
Also, those output terminals are clearly color-coded right on the front panel, which is again how it should be done. Neither the Instek nor the Siglent does this as well in my opinion. Some of us GPP-4323 owners have resorted to marking the output terminals with acrylic marker. EEVBlog user jjoonathan pioneered this technique. My attempt to copy him is shown below.
The Instek is pretty compact, at 213x145x312 mm. The Hantek is wider, taller and deeper, at 232x153x392 mm, which could be a consideration if your bench space is limited.
The main advantage of the Instek is of course that two of its channels can be changed from power supply to active load mode. It turns out to be surprisingly useful to set up a load channel to constant current and use that as a current sink for non-destructive testing of LEDs, Zener diodes, and the like. I have also used a load channel in parallel with an output channel to make a two-quadrant source for emulating a battery in charge/discharge modes.
Good luck with your decision.