I think both depends on experience on the market. Day trading involves making trades that last for seconds or minutes, taking advantage of short-term fluctuations in an asset's price. While, long-term investing consists of making trades that stay open for months, and often years. These are buy-and-hold trades, rather than quick, buy-and-sell-trades.
The decision-making process for a day trade can be quite different from a long-term investment with different skills and, in some cases, personality traits required for each.