var other : Transform;
if (other && transform.position == other.position)
print ("I'm at the same place as the other transform!");

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public Transform other;
void Awake() {
if (other && transform.position == other.position)
print("I'm at the same place as the other transform!");

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public other as Transform

def Awake():
if other and (transform.position == other.position):
print('I\'m at the same place as the other transform!')