If you have shorter hair or don’t let it cover your ears then the deep canal aids you listed will generally be the most discreet. I can’t tell my patients are wearing them unless I look closely in their ear at just the right angle. If you have a hairstyle that covers your ears then any hearing aid will be rather discreet.
Is there a reason you’re considering the Dots rather than say the Alera (ReSound’s current model)? The Alera includes Bluetooth connectivity through an optional phone clip, while the Dots don’t. This is also true (Bluetooth connectivity) of most of the current BTE models out there.