Unity Multiplayer Networking: Photon vs Netcode vs Socket.IO

using Unity.Netcode;
using UnityEngine;

public class PlayerMovementNGO : NetworkBehaviour {
    public float speed = 5f;

    void Update() {
        if (!IsOwner) return;

        Vector3 moveInput = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        if (moveInput.magnitude > 0) {
            RequestMoveRpc(moveInput);
        }
    }

    [Rpc(SendTo.Server)]
    private void RequestMoveRpc(Vector3 input) {
        // Note: Sending input every frame is simplified for demonstration.
        // Production code should validate input on the server.
        transform.position += input * speed * Time.deltaTime;
    }
}

using Fusion;
using UnityEngine;

public class PlayerMovementFusion : NetworkBehaviour {
    public float speed = 5f;
    
    // Networked property automatically synchronized to all clients
    [Networked] public Vector3 NetworkedPosition { get; set; }

    public override void FixedUpdateNetwork() {
        // Only the State Authority (usually the server) runs this
        if (HasStateAuthority) {
            Vector3 moveInput = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
            NetworkedPosition += moveInput * speed * Runner.DeltaTime;
        }

        // Note: This simply assigns the replicated state for demonstration.
        transform.position = NetworkedPosition;
    }
}