Im surprise at your comment. There are some very fundamental differences in the signal processing between Oticon / Phillips, bernafon and Sonic. For starters some of it core technologies like speech guard, directionality, etc are implemented differently. For example - correct me- the DECS adapts to the settings based on the environment. The older bernafon is still channel free, and their sound is very different. Ofcourse, the impulse noise , handling and wind reduction is the same as well as Tinitus sound support.
Compare to other groups such as resound, their products across different brands are more distinct.
I know places where they sell both brands and have their customers try Phillips and Oticon where the vast majority report they do sound different
As per your Phillips comment, it’s sold through distributors- give you an example in Brazil it sold through dispensers (not direct to consumer) which have shops that are branded Phillips.
The dispensers I have meet that sells Phillips are not having the success of Costco, an in fact have somewhat harder time.
For $1,500 a pair if Phillips is more than a fair deal.