As just a HOH person the only knowledge I have is wearing brands of aids.
I have phonak Solanas and they have been the best hearing aids ive ever worn. This is my 4th set of aids. I tried resound open ear, I dont remember the model but they were very very small btes. They were not right for me, they had a hollow sound and like an echo. My speech comprehension is terrible and the resounds did not improve it at all but the phonaks did and enough where I can hear more often and more things without straining. My hearing is so bad no aids will ever get me to where I wont have to strain and read lips.
I have no high tones at all they are gone erased and my hearing overall is degrading anyway.
I like my phonaks ALOT but alas they may be running out of power for me soon.