I would prefer a lottery because it means that I have potentialy more funds to earn.

Making one single ETH won't make me richer, but hitting the lottery will change my life status for ever, I would rather take the risk to change my life status then taking a short risk that will probably won't affect my life status at all.
Anyway, sweepstake happens much frequency which means that you have a larger chance of getting addicted to that and losing more money- as lottery rarely happens you won't lose a lot of money even if you become addicted to it.


Overall you should make sure that you know betting is just for fun and bet on what makes you more happy.