Going by the definition given in the wiki you’ve linked, a Sybil attack is about creating many fake identities to gain disproportionate influence in a network. A 51% attack in blockchain terms is specifically about controlling the majority of the network’s mining/staking power to override consensus.

So I'd say they're not exactly the same.

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ceejayoz 4 days ago | parent [-]

Someone amassing 51% of the network would probably want to do so under some fake identities so others don't realize what's about to happen. Not the same, but probably related.

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delfinom 4 days ago | parent [-]

Lol, there's no such thing as "fake identities" here. You just run more miners with different payout addresses for mining. But there is no "fake"

	▲	ceejayoz 4 days ago \| parent [-]
		> You just run more miners with different payout addresses for mining. That it's dramatically easier to conceal your identity doesn't mean concealing your identity isn't useful.