What you can do is read as much as possible, and make a guess. Most of what you have read will probably have been indirectly sponsored by the manufacturer, or one of its competitors. None of it will be rigorous - in fact, the most honest information you get will be anecdotes from people whose purchases have failed, and who are as likely as not outliers.
Nope. The information made available is usually laughably sparse. And often you only learn about the model’s reliability when it isn’t in the market anymore. Models change faster than reliability can be assessed.
Beyond this, is the brand white labelling and the same or differing parts for varying lines of appliances from different brands even.