You cant compare an FM system to a ALD. It’s like comparing a Mercedes to a 1968 Dodge Dart
I have the comfort contego FM system and it is the most amazing device and my hearing is in the severe range. As long as I am in a quite environment I dont struggle to hear people anymore. In noisy environments it doesnt help a great deal because you have to put the transmitter close to the person which is not always practical. But for work and school purposes which are quite environments it’ll help you a great deal.
The product also works with your TV. You connect the transmitter to the TV and you will hear it crystal clear (at least I do).
The price is steep, i paid over $800 for mine but it is worth every penny. I consider it a gift that God dropped down to me because it helped me hear so much better at work and relieved all the stress I had day after day. I cant say enough good things about it.