I want to preface this by saying I'm not spamming, promoting or anything of that sort.

I'm building a product for my company and we need to purchase a subminature speaker (the kind used in hearing aids). I have narrowed it down to one specific model but there are a number of options that I can use. My knowledge is very basic but ends at sensitivity, impedance, dampening etc and the effects each has. Below is a graph of the model with different options. If you're interested in helping me pick the right one, please PM me and I'll email you all the pdfs of each option and exactly what I'm trying to do. I really need help here. I thought I had everything covered for this product but my partner came up with an issue she didnt bother telling me about in the beginning so I had to find a new speaker. Any help is much appreciated.