I would probably concur with @billgem that perhaps the AI used for noise removal from speech is the same as the AI used in the Philips 9040, which is described as an AI to remove noise from speech as well.
The first screenshot below is the Bernafon mention of its use of machine learning to get cleaner speech signal.
The second screenshot below is the Philips chart showing how its AI does noise removal to remove noisy speech input samples.
So both talk about remove noise from speech using AI → it’s highly probably that they use the same AI to do this.
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I see that the Bernafon Alpha XT 9 mention the wind and handling noise control, but there’s no sudden sound stabilizer mentioned anywhere. These 2 features are the new additions from the Oticon More to Real, and from the Philips 9030 to 9040. It’s very curious as to why the Bernafon Alpha XT 9 only has 1 of the 2 features.