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Depends on the rules of the lottery, i.e. what the payout is for a win, and what counts as a win.
e.g if you have 100 "wins" of 3 numbers each you get 100 x £10, but that's a different calculation to 100 wins of 6 numbers each, where a single jackpot is split 100 ways.
You'd need to do an "expected value" calculation (http://www.statisticshowto.com/probability-and-statistics/expected-value/) for each outcome and then compare them.
If you're just counting wins as winning the jackpot (or a share thereof) like a raffle, then your examples are equivalent. (single ticket has 1/100 chance of winning, but your win is 100 times the size in the end).
Also depends on the number of entrants. What are the chances that you're sharing your win with someone else?
(Physicists ht on, maths hat off) But the expected value of a lottery win is so close to zero anyway, nothing you do make much significant difference.
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Drakien
@n3il
If i was going to buy a hundred lottery tickets, would i be better off getting tickets for 100 different draws, or all for the same draw?