When comparing Wasabi to Backblaze B2, here are some differences to consider:
1. Wasabi's per-GB monthly storage price is less (Wasabi = $.0039 / GB / mo vs. Backblaze B2 = $.005 / GB / mo)
2. Wasabi never charges for API calls (Backblaze B2 charges for API calls above a certain level)
3. Wasabi's read/write speeds are generally regarded to be faster than those that can be attained with Backblaze B2 (see this reference).
4. Wasabi offers higher data durability (11 x 9s) vs. Backblaze (8 x 9s - see this article).
5. Wasabi uses the AWS S3 API as it's preferred storage interface (vs. a proprietary storage interface used by Backblaze B2). Hundreds of storage apps support the S3 API (many examples are listed at wasabi.com/interop) vs. a lower number of apps that support the Backblaze B2 proprietary API. If you want to have the maximum choice in storage apps, then using a service that supports the S3 API is the best approach.