Indeed, I have been reading many old threads, and I'm well aware of these differences. But I'm really out of luck with both of these scopes, regarding firmware updating:
ADS1022C: this one currently has a 2.x firmware, but I know the latest is much improved, but I can't find if anywhere. The best would be to find SDS1000C latest firmware, since it seems Siglent has much more care about their products.
ADS1102CAL: I already got some FWs from forum posts, but none work on my scope, which is an early version. I could even find a bin dump from the actual chip, that I could try flashing using JTAG, but I think that would brick my old ADS1102CAL, since it's hardware version is 2.00. I never found any mention to this version online, all info I could find is about later versions. I already have the SDS1000CNL FW, hoping I could some day flash it, but I can't do that until I figure out which FW update I need to move my scope from the ancient firmware it currently has.
So, I'm stuck. I'll keep using them the way they are, as long as I can, many thanks again!
Eduardo