It's advantageous to use different brands to protect e.g. against firmware bugs.
You also might want to check https://www.backblaze.com/blog/backblaze-drive-stats-for-q2-...
You also might want to check https://www.backblaze.com/blog/backblaze-drive-stats-for-q2-...
And this website looks very useful, since my biggest concern is durability of the disk.