Well, I hope you mean to compare between day traders and long term investors.
Although I don't know much about stock trading but I think I have an idea about cryptocurrency which is almost similar though. From my own point of view, I think the day traders actually earn more than the long term investors.
This is because a long term investor may just invest in a single coin or a couple of them and wait for a very long period of time before coming back to check up on it or even to attempt a withdraw. And within this long period of time, I believe that the coin he bought but have been increasing and decreasing in value and that's where the day trader comes in.
The day trader will only like to benefit from it when it is increasing and will probably withdraw his investments temporarily when it's decreasing in value to another coin where it will continue to increase and probably, he will reinvest back to the original coin when he notices the coin is going to go bullish.
So if we are to calculate it, I think the day trader will be on a better side. Just that day trading comes with a lot of stress and hardly can you dovetail it with anything else, that's why most investors don't really like that option.