Customizability: how precisely devices can be fine tuned to your hearing loss. With lower tier tech you get reduced channels compared to premium. You’ll still get a good fit accurate to your prescription (but it will be less precisely customizable).
Performance in background noise: based on processing and communication between your hearing aids. With lower tier tech you make some compromises on features which improve speech clarity in background noise. You’ll still see benefits, but less clarity than premium tech.
Ease of use: added programs and features. With lower tier tech you get plenty of additional programs and features. These make your hearing aids more adaptive and convenient.
Cost: Entry tier tech is the lowest cost. You lose some features, and save some money. Balance your preferences and hearing health needs with your budget.