The Resound Quattro aids are 100% better than the Marvel aids. The Marvels are a nightmare when going out to eat or simply riding in the car with the music on. This is due to the Autosense 3.0 os that is included with the aid. It auto adjusts for you and you can definitely hear it adjusting volume and settings in your ear which is super annoying. If you turn the volume up over 1 it starts to get echoey. This seems like a rushed product and I was very disappointed.
Resound gives you customization on the fly and if you don’t want any tech on you can turn it all off with the app. Resound gives you complete control unlike Phonak. The only good thing about phonak is being able to use blue tooth for calls and streaming with Android. Resound is getting this update via firmware this year. I had high hopes for the Marvel but they are anything but Marevelous. Quattro is the way to go.