Comparasion of Integer.equals() and Objects.equals()

Here are my test for two equals methods:

    Random generator = new Random();
    long startTime = System.nanoTime();
    for(int i = 0; i<1000; i++) {
        Integer int11 = generator.nextInt(1000);
        Integer int22 = generator.nextInt(1000);
        int11.equals(int22);            
    }
    long endTime = System.nanoTime();
    long duration = (endTime - startTime); 
    System.out.println(duration + " ns");

    Random generator1 = new Random();
    long startTime1 = System.nanoTime();
    for(int i = 0; i<1000; i++) {
        Integer int1 = generator1.nextInt(1000);
        Integer int2 = generator1.nextInt(1000);
        Objects.equals(int1, int2);
    }
    long endTime1 = System.nanoTime();
    long duration1 = (endTime1 - startTime1); 
    System.out.println(duration1 + " ns");

I just wanted to know, how much slower is the Objects.equals() method, but I got following output:

1005750 ns
650554 ns

When I replaced these two methods:

    Random generator1 = new Random();
    long startTime1 = System.nanoTime();
    for(int i = 0; i<1000; i++) {
        Integer int1 = generator1.nextInt(1000);
        Integer int2 = generator1.nextInt(1000);
        Objects.equals(int1, int2);
    }
    long endTime1 = System.nanoTime();
    long duration1 = (endTime1 - startTime1); 
    System.out.println(duration1 + " ns");

    Random generator = new Random();
    long startTime = System.nanoTime();
    for(int i = 0; i<1000; i++) {
        Integer int11 = generator.nextInt(1000);
        Integer int22 = generator.nextInt(1000);
        int11.equals(int22);            
    }
    long endTime = System.nanoTime();
    long duration = (endTime - startTime); 
    System.out.println(duration + " ns");

I get very similar output to the previous one:

1026871 ns
614074 ns

So, my question is: Why does the second "test" execute much faster than the first one in both cases? What does it depend on?