It goes without saying, there are so many styles of hearing aids. In reality, the right style for each person depends on their hearing loss. In addition, lifestyle needs such as cosmetic issues or finger dexterity are valid needs.
Your hearing specialist will be an invaluable resource for you in the decision making process. At any rate, choose the styles of hearing aids that suits you. Then, you can talk about the technology options.
CIC
Completely In The Canal
ITC
In The Canal
ITE
In The Ear
mRIC
Receiver In The Canal
BTE
Behind The Ear
Wired hearing aids are independent of each other. Wireless hearing aids talk to each other. For example, when you turn up the volume on one hearing aid, the volume on the other hearing aid is turned up also. Consequently, they each have their own pros.
Of course, you might like to add another assistive device such as a remote microphone or another accessory. Now or in the future, if you do, you will need to make sure your hearing aids are wireless. This way, they may be able to communicate with your devices. Be sure to discuss this with your Hearing Specialist.