Before asking any questions, I want to say that I am sorry for my BAD English. I am not a native speaker and seek some help and guidance.
The main question is whether the OpenWRT version for the old version of Keenetic Speedster (KN-3010) is compatible with the new model (KN-3012)?
A less important question: how NOT to turn my router into a brick ? Maybe there is a way to copy the bios or how else it can be called before experimenting with main source of the internet?
To make the topic a little bit spicy, I will mention that I am from Russia and we have some problems with YouTube. Instead of blocking it completely, ONE government structure decided to make the speed of YouTube unbearable. Even 140p quality may not load.
There are simpler fixes for this issue, but I want to do something with my router to keep my TV useful.
Could you examine OEM boot log for amount of memory, cpu architecture, and mtd partition space, as well as wifi drivers. Even same mainboard layout may have pin-compatible 1 generation newer wifi, half or double ram or flash.