I feel the same as far as energy level, lack of tiredness, staying awake, etc, so I don't see any difference between the machines for the things that really matter.
The ResMed machine runs at higher pressures than the Philips. The doctor started the ResMed with the same minimum settings as the Philips and right away I had to tighten down my mask as it was getting blown out.
With the same minimum settings, the median pressures on the ResMed were higher than the median pressures on the Philips.
After the 1st month the doctor reduced the minimum settings to be lower than what the Philips was set at and the median readings on the ResMed started to be closer to the median readings on the Philips.
It would appear to me that, with both machines starting out at the same minimum, the ResMed is more aggressive at raising pressures when needed to maintain the airway.
I don't know if ResMed measures AHI the same as the Philips, but the numbers that it reports are significantly lower: <.1 overall vs 0.7
My AHI with the Philips was generally under 2, often under 1, with rare nights of zero. The ResMed has reported an AHI over 1 only once in 2 months and regularly reports nights with AHI = zero.
The hose for the ResMed is much stiffer than the hose for the Philips. I prefer the Philips hose which is more flexible.
The ResMed humidifier either holds more water or uses less water, I'm not sure which, although I really didn't have a problem with the Philips water tank level.
Both machines occasionaly 'click' when the pressure changes from inhale to exhale or vice-versa. Reseating the humidifier usually takes care of it.
The ResMed is quieter than the Philips. Of course, it's also much newer.
The manufacturer's software for both is much inferior to OSCAR.
I'm sticking with the ResMed - the Philips is now my backup machine.