Which low-cost high-quality device is the most suitable to write further validation papers with it?

According to our own little experience PiEEG. Raspberry Pi’s where developed and sold by developers at the university level, and PiEEG as well. OpenBCI is similar to PiEEG but the architecture of OpenBCI is about 10 years old and the architecture of PiEEG is simpler than OpenBCI and according to our own little experience more …