Per the author in the link you posted, the PineNote appears to still be a prototype in development and does not sound like it's really anywhere close to be competing against the consumer-ready remarkable:

"If you’re looking to buy a PineNote in the first batch, you must expect to write software for it, not to write notes on it. The software shipping from the factory for the first batch will not be suitable for taking notes, reading e-books, or writing your dissertation. It may not even boot to a graphical environment."