I may not have enough data with the Eson but my sense is that I get a little lower AHI's with the P10. The problem with the P10 is that I seems to wake up three or four times per night. I believe the wake-ups are due to small leaks that get started when I move in my sleep. Also, water from the humidifier seems to accumulate in my nose (even with the heated hose) and then drips out which also wakes me up. My AHI's with the P10 vary from as low as .9 to the mid 2's.
With the Eson, I believe I wake up much less but my AHI's are in the mid 2's and I have never been in the 1's with the Eson.
The Eson is just more firmly held in place so I think I get fewer leaks from movements. I don't mind the fact that it has more straps and such.
Note that the leaks I am talking about are not big leaks that show up on my data record. They are just small leaks that make a little noise but I am guessing that it's enough to wake me up.
I am curious though is there is any physics to explain why I might have slightly higher AHI's with the Eson compared to the P10?
Also, I am wondering if there might be an even better nasal mask. I am open to suggestions. I was just given the Eson by Kaiser to try so it wasn't something chosen based on reviews or research. I've read the reviews for some of the other top selling nasal masks including the Dreamware but every one has folks that like it and folks that don't.