Whats the precise difference between abyssal and ebon armor?

[chulakamulaka]

Chasmal vest: 300% damage, 300% armor, like 1-2% hp bonus, 4-5% hp regeneration, and 3.5~ second proc duration. Chasmal procs on dealing damage.

Ebon vest: 300% damage, 300% armor, 50% haste, and 5 second proc duration. Ebon procs on taking damage.

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