kharri, I picked up my 9040s on Thursday so I can now offer some comments.
One of the things that I want from the 9040 is more openness to all sounds than the KS10. I can definitely confirm jayman2’s comments about giving a more open experience, and it was his comments that got me to pick the 9040. While I was waiting for the 9040 I experimented with opening up the KS10 to more sounds by turning off/down noise suppression, using Music as a general listening mode, etc. The 9040s are just better, even with the KS10 tweaked as much as I could. I also prefer the overall character of the sound, in spite of the fact that I had them boost the high frequencies above the REM fitting and need this backed-off because it is too sharp.
Speech in noise. I bought a Roger Select for my KS10, and there is nothing better than it, in my experience. But I keep forgetting to have it with me when I encounter a noisy environment. So I wanted the 9040 to be at least minimally acceptable w/o aux device. Last night was the first test. We went out to dinner to celebrate my birthday. Very nice restaurant, but quite a lot of background noise - not the crazy noise of a resonating brew pub, but enough to be a problem. The 9040 grabbed my wife’s voice very well, better than the KS10. I tried it with Live Listen and that was even better. So I’m encouraged that these hearing aids will do what I want - but it’s early.
One surprising and fairly dramatic difference is wind noise. I have an electric scooter for golf. I drive it to/from the courses that I play, up to five miles away. The scooter top end is 32 mph. I’m not super sensitive to wind noise annoyance, but with the KS10 I have to turn volume down all the way to not be distracted. I was surprised to find out that there is less wind noise distraction with the 9040 at full volume than the KS10 at minimum volume.
A feature that I like is the Apple Watch app. I can make some adjustments to the 9040 from my watch. I like this. Seems like it’s just like the Oticon Watch app, except that it lacks the “Speech Clarifier” feature,
Another feature that I like is replaceable batteries. My KS10 charging reliability has gotten a bit wobbly at times, and when streaming I am never quite sure that I’ll make it through to bedtime. I’m now on day #2 and the app tells me that the batteries are still at 100%, so I assume that I have a problem with the battery meter.
Negatives so far: Itchy ears - I am alternately trying double vented domes and power domes (high freq. hearing is -90db+). Why both domes causing itching, when I’ve been wearing hearing aids for going on 15 years, is beyond me.
The app seems fine for what it is, but has nowhere near the adjustment ability of the Phonak app. But do you know what? I don’t think I’m going to need much. These aids in General seem to do almost everything well, including in a noisy setting, so I may need only General and Music.
The streaming audio sucks in comparison to the KS10. When I got the software updated in my KS10s a few weeks ago I noticed a big improvement in streaming audio quality. I find the 9040 disappointing in comparison and even on an absolute scale. I’m just betting back to MFI, so maybe I’m not finding the right adjustments, don’t know.