I asked my audie 2 weeks ago about this and he says both HAs are great but the Naida has more features, including transposition/soundrecover that would benefit me more. Both HAs can give up to 80db gain with the Sumo capable of 3-5db more gain in the low frequencies. You will find out more in a few days when you see your audiologist for a HA test unaided and aided and ill be able to offer advice upon seeing your numbers. Im off to play chess so ill chat later. But ill reply here between games.