They were from a prerelease 12 bit SDS1204X HD.
OK that make sense if it is a 12bit oscilloscope. So it seem there will be more choice available tho I doubt there will be any under $500 12bit 4 channel available anytime soon.
The DHO814's x20 of a stopped waveform looks better than I was expecting.
The SDS1204XHD's screen plotting is higher resolution, might be better, diffcult to tell with the different speeds and rendering.
DHO814's waveform plotting area is 1000 x 412 pixels, the SDS1204XHD's is 844 x 480.
Don't know the SDS1204XHD's price.
I can't see the dark green.
It will not make sense to do more than 10x zoom with a 12bit oscilloscope.
Since both oscilloscopes are 12bit the resolution will be the same is all about the noise.
I'm sure both can do 1000 pixels on x but is a bit strange they chose 480 means they use divide by 8 instead of by 10.
The SDS1204X HD is likely equivalent to Rigol DHO1204
DHO804 is $399 vs DHO1074 $999 and likely lowest cost SDS1xx4X HD will be around the same $1000
I can not justify $1000 for the DHO1074 when DHO804 is $400. The smaller size and USB input power are a plus for my use case.
There was no much interest up to now on 12bit scopes because they where in a very different price bracket.
8 bit will still have its place for better horizontal resolution as you can have a faster 8bit ADC and 8bit takes less space in memory.
One thing I notice is that Rigol uses antialiasing for both text and graph while Siglent is not.
That also explain why they need 412 pixels instead of 410.