Different animals. Blossom delivers what IPFS only promised which is great for small individual files (image) repeated ad eternum that were depending on URLs.
Torrents are great for large volumes of data where the load is better/faster shared by many hosts.
People are pacient enough to wait a minute for one torrent to start (torrent initialization and swarm search), they wouldn't be patient to wait one minute for a small image to load.
Other than that, I'm a big fan of torrents too.