@gulzar My hearing loss is high-frequency, but I have a very good audiologist and I trust her to know what is right for my hearing problems. If some hearing aids are better for high-frequency loss and others for low-frequency loss I wasn't even aware of that. I do know that there are other attributes that make some more appropriate for certain hearing losses. I lost a lot of clarity in my hearing a few years ago. The words do not get interpreted well by my brain unless they are very clear. For that, my audiologist recommended the Opn1 hearing aids and they did provide better clarity than my old Phonaks, but the Phonaks were better at directionality.
My daughter's hearing loss is the opposite of mine, plus hers was from birth or infancy, and mine happened as I aged. Her loss is low frequencies, which is what I believe they refer to as reverse slope. She has ReSounds and loves them.
If you find a good audiologist you should be able to have confidence in him or her to help you find what is best for you. Most audiologists allow the patient a trial period too. I had two or three different pairs for trial periods one time before I chose which helped me the most.
Good luck with this. I will be interested in hearing which aids you end up with.