Endgames
It dependes how much pawns are in the Board and If there are Roocks on the Board. With more pawns are bishops better because the knights need longer to move to the other Side of the Board. If there are more pawns, knights are better because the bishops can be blocked. Also are in my opinion Knights are better when there are Roocks on the Board because I can Play that better than with bishops but I think in General IT also dependes how much pawns are in the Board