Is a Cyton 3 channel gold standard ECG device with HeartPy more accurate than a Polar H10?

If so, we had a new gold standard ECG device for all kind of people. The following paper says the Cyton can be used instead of a device from Adinstruments which costs 15 000 USD for certain applications: The Adinstruments Equivital with LabChart software is the only device we know which is sold as «ECG …