Eh. I've done both. Data science is better.
There are drag days to be sure, but having to get up at 5 in the morning every day and working until your whole body is sore then having to do it again sucks if you have to do it every day.
There are drag days to be sure, but having to get up at 5 in the morning every day and working until your whole body is sore then having to do it again sucks if you have to do it every day.