I have messed the colors. Still, I wouldn't trust a red, purple or green due to their marketing towards a specific use that doesn't make sense to me. I wouldn't rule out a Blue for casual use, but I would go for Black or Gold if I wanted reliability and some heavy operation.
I don't trust the Toshiba drives, they don't fail at spectacular rates but they can be finicky, hopefully their more expensive line might be better.
The older Reds were fine, I've had plenty of those running for 5+ years, but I wouldn't trust the new ones with potential SMR except in single drive applications with no kick-out.
The spin rate of the red drives tries to balance speed with power consumption, no head parking, and specific error recovery rates and timeouts that are known so a RAID controller doesn't kick them. Never cared about the other ones, so who knows.
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