Why is Ne2 better than Nf3? I played Nf3 for attacking on king side which is about to castle having some plans to make a battery in future after castling but I feel Ne2 is making a block for Re1 at some point. Any suggestions?

[fen "rnbqk2r/pp3ppp/2p3n1/3pP3/3P4/2PB4/P4PPP/R1BQK1NR w KQkq - 0 1"]
While the knight wouldn't be badly placed on f3, playing Ne2 keeps your f2-pawn unblocked, allowing you to push it up the board. If the pawn reaches f5 then you will have an overwhelming position. Also, on e2 the knight could go to g3, helping to control the f5-square while eyeing the h5-square.