Which script [method(s)] would be "efficient"?

I have two scripts that I have created and I was wondering of the people among the community could tell be which would be better and efficient then the other and why and in what instances would one be better than the other? I am aware unity's new UI makes this irrelevant but it would help me improve on a more technical level.

(Sample 1)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class Button : MonoBehaviour {
5.  
6.     public string data = "www.google.com";        //Reference to string data
7.     public bt buttonType;                        //Reference to the enum bt
8.     public enum bt {Game, Options, Exit, URL};    //Reference to the enum bt
9.  
10.     void Update () {
11.  
12.         //Iterate through all the touches
13.         for(int i = 0; i < Input.touchCount; i++){
14.  
15.             //If they are in the 'Began' touch phase
16.             if(Input.GetTouch(i).phase == TouchPhase.Began){
17.  
18.                 //Create a reference of the touches position in world space
19.                 Vector3 x = Camera.main.ScreenToWorldPoint(Input.GetTouch(i).position);
20.  
21.                 //Check if it overlaps this collider
22.                 if(Physics2D.OverlapPoint(x) == collider2D){
23.  
24.                     //If so run this switch statement
25.                     switch(buttonType){
26.  
27.                     //Quit the application
28.                     case bt.Exit:
29.                         Application.Quit ();
30.                         break;
31.  
32.                     //Load a new scene
33.                     case bt.Game:
34.                         Application.LoadLevel(data);
35.                         break;
36.  
37.                     //Load the 'Options' scene
38.                     case bt.Options:
39.                         Application.LoadLevel("Options");
40.                         break;
41.  
42.                     //Open a URL
43.                     case bt.URL:
44.                         Application.OpenURL(data);
45.                         break;
46.                     }
47.                 }
48.             }
49.         }
50.     }
51. }
52.  

and/or

(Sample 2)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class VirtualButtonHandler : MonoBehaviour
5. {
6.  
7.     public Button[] buttons;        //Reference to Button array
8.  
9.     void Update () {
10.  
11.         //If touch count less then 0, return
12.         if(Input.touchCount < 1)
13.             return;
14.  
15.         //If the first touch has began
16.         if(Input.GetTouch(0).phase == TouchPhase.Began){
17.  
18.             //Create a reference of the touch's position in world space
19.             Vector3 touchPos = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
20.  
21.             //For each button in the array
22.             foreach(Button b in buttons){
23.  
24.                 //Check for any overlay with the Vector3
25.                 if(Physics.Overlap(touchPos) == b.myCol){
26.  
27.                     //If there is collsion...
28.                     if(!b.isURL){
29.  
30.                         //...Load the scene
31.                         Application.LoadLevel(b.data);
32.                     }else{
33.                         //...Open the URL
34.                         Application.OpenURL(b.data);
35.                     }
36.                 }
37.             }
38.         }
39.     }
40. }
41.  
42. public class Button
43. {
44.     public Collider2D myCol; //Reference to collider
45.     public string data;            //Reference to string
46.     public bool isURL;            //Reference to boolean
47. }
48.