XPS 1530 Core Temperature

So I've had my XPS M1530 for a little over a month now and decided to download HWMonitor to monitor my temperatures...I've noticed that core#1 is consistantly 10 degrees celsius hotter than core#0.  I've downloaded a couple of other temperature programs to see what they would say and they also show this 10 degree difference?  Aren't both cores supposed to run at nearly the same temperature considering it's the same chip?  Should this be a cause for concern?  I've been monitoring for a week or so by the way.