Some are faster if your solo ( in a normal group ) because you can each get things done separately When your boxing those, you can only do one thing at a time, so they take longer for a boxer. Example.. Greenstone village, one part has you "ride" barrels back to the brewery. You have to go get one at a time.. mount it. switch.. get another etc.. if your in a normal group you can all go get one at the same time.