"They have equal value which worths 3pts." ++ No. N = 3.05 P < B = 3.33 P, See Table 6
You should study the basic checkmates KBB vs. K, KBN vs. K, KNN vs. KP.
Then you will understand why B > N.
Roughly B = N + tempo.
After 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6, white has a choice between keeping the bishop but losing the tempo with 4 Ba4, or losing the bishop but gaining the tempo 4 Bxc6.
They have equal value which worths 3pts. Equal power of strategy So, I.m asking your opinion which one do you prefer? In my case, I prefer a knight because its flexibility. A Knight can jump other pieces, can go all squares and more suitable to fork attack. Someone would prefer bishop because a bishop goes further and faster than a knight/