Calculating hours with Java 8

I was doing some testing with java 8, and was trying to figure out the difference between hours of two dates. I did it three ways, though, I do not know which one would be the right one and would like your help.

 LocalDateTime t1 = LocalDateTime.of(2014, Month.NOVEMBER, 25, 8, 23);  
 LocalDateTime t2 = LocalDateTime.of(2014, Month.NOVEMBER, 25, 10, 23);  

 long horas = ChronoUnit.HOURS.between(t1, t2);  
 System.out.println(horas);  

 long horas2 = t1.until(t2, ChronoUnit.HOURS);  
 System.out.println(horas2);  

 long horas3 = Duration.between(t1, t2).toHours();  
 System.out.println(horas3);  

As far as documentation goes, horas2 and horas3 are equivalent, but I was in doubt about the first mode. Is that correct?