What is the difference between the Adinstruments Equivital, OpenBCI Galea and devices we build ourselves by combining sensor data from different sensors in a single InfluxDB?

Adinstruments Equivital is device that costs between 2000 to 3000 USD, breaks easily, has a warranty time of as far as we know three month. We expect that the OpenBCI Galea has a similar construction principle than the Adinstruments Equivital.

Therefore, let s buy sensors seperately, which can easily be replaced, and combine sensor data in one InfluxDB, which we support ourselves and lives forever.