Yes, normally one would want to try out the built-in Speech in Noise program first to see if it helps. If it doesn’t help so much compared to the Default Program 1, then the MoreSound Booster would be the next step to try.
The key difference between them from what I understand is that the Speech in Noise program tries to clean up/enhance the clarity of the speech in front as best as it can (depending on what you set for the Neural Noise Suppression level in there), but all the while still trying to preserve the surrounding sounds so you don’t lose out too much on being able to hear the surrounding sounds.
But if this is still not enough to understand speech in front better, then the MoreSound Booster will take you to the next step and try to suppress the surrounding sounds more aggressively as well, in addition to what’s already done by the Speech in Noise program, to give you that extra “boost” (hence MoreSound “Booster”) of clarity by increasing the front speech signal to noise ratio even more via suppressing the “noise” more. But some have commented that it acts more like a MoreSound Suppressor than a MoreSound Booster, because it gives them the perception of the surrounding sounds being suppressed.
Also, normally Oticon doesn’t like you to always be using the MoreSound Booster because that counters the “open” paradigm it promotes on the More (and OPN/S) line. So that’s why they put the MoreSound Booster for the user to access in the P1 default program only. If you have P2 containing Speech in Noise, for example, you will not be able to enable MoreSound Booster on P2 Speech in Noise. And if I remember correctly, upon reboot of your ON app or More, you’ll need to re-enable it again, it doesn’t remember that it was on from the last time.
You can read this thread on the forum for more details: