While Spotify remains the leader in music streaming with over 60 million subscribers, lots of competitors are still trying to compete (like Deezer, Apple Music, Napster etc)
Even if the subscriptions are pretty similar from a website to another (from 9,99 € for an individual subscription), some of them are trying to compete offering Family subscription (at 14,99 € for 5 or 6 members) or Student subscription (at 4,99 €).
The price of the subscription is not an evidence due to the tariff alignment, so the user will focus on other criterions, such as sound quality and/or artists' remuneration.
Those for whom the artits' remuneration is one of the most important criterions, will naturally go to websites like Qobuz or Tidal, whose subscriptions, more expensive, reflect a better remuneration of the music professionals. In return, the sound quality is optimal, lossless, reflecting studio recording (which is not the case of most of the websites that usually offer MP3 format).
To help you understand, here is a quick summary of different music formats used in the music streaming world:
MP3 format: It is a zipped format with lots of losses. The sound quality is degraded compared to the original files, but it doesn't require a lot of storage space.
AAC format: It is a zipped format with losses, but it offer a better sound quality than MP3 format.
OGG Vorbis format: It is a zipped format with losses, often used by Spotify.
WMA format: It is a zipped format with losses, created by Microsoft, wich is protected against illegal copying. It is often used by Napster.
FLAC format: It is a lossless zipped format. The sound quality is very similar to a CD quality, while it requires twice less storage space.
Hi-Res format: “It is THE lossless audio capable of reproducing the full range of sound from recordings that have been mastered from better-than-CD-quality music sources” (definition as per Digital Entertainment Group). To date, only Qobuz and Tidal offer such high quality to their users. Here is an article published in What Hi Fi that will tell you everything you need to know about this High-Resolution format.