My own 2-cents’ worth: I own and use both RIE and ITE aids. It’s a great pair that actually solves ALL my listening needs - albeit in a cludgey sense, since I’d really rather use ONE pair of aids that use ONE size of battery and STREAM with my phone and TV. Such is not my universe … yet.
I find the soft domes of the Oticon OPN aids way more comfy to start my day with. I can sleep with these on (and hear alarm clocks in the morning!), wear them on long flights, and basically not even know I have a pair of aids in. That is IF I get the receiver to seat in the ear right. The soft domes sit over a matchstick-shaped receiver. Now is that stick comfy to shove into an ear canal? Only if you do it right.
By contrast, my Agil Pro ITE aids are hard plastic. Since I wear them maybe 1/3 to half the time, they still fit, but seriously, our ear canals change shape like our creaky joints during the day. So these HARD plastic aids will simply not fit in my ears if they are swollen (with sleep, humidity, workout sweat, etc.,).
It’s comical, but without a perfect solution (comfort, fit, seal, etc.,) I am happy juggling two sets of aids with two sizes of batteries and only ONE of them that streams with the phone, and only the other that streams with my TV. Far from perfect. But at least I can get through all my communication situations.
The RIE aids can be used with a headphone for music (or phone!) if I boost them up over my ears where the mic is; the ITE aids can be used easier with a phone just lifted to my ear (no feedback). It’s a balancing act that I’ve simply had to adjust to as there is no perfect device out there to fit all my needs.