[Mashiro]

Would you say this coc computer is the best in terms power/cost which also comes cheap and runs linux ?
Is there any other portable/coc computer that is cheaper and comparably powerful or more ?

There are many other SBC devices with SoC on them in the market. Orange Pi, ODROID, Pine and many others. All have different board versions with more and less features (small ones, big ones, medium ones, ones with x86 CPUs even). The Raspberry Pi needed this upgrade for years because competitors offered real Gigabit Ethernet, USB 3.0 and some of the other features since long ago already. The price was about the same as the Raspberry Pi.

I only have a few Raspberry Pi of different generations and a 1st generation LattePanda. So I can't really tell you much more. Can recommend the following Youtube channels for fun with SBCs.

ExplainingComputers: https://www.youtube.com/explainingcomputers
ETA PRIME: https://www.youtube.com/channel/UC_0CVCf...qmyClu59Uw