Hi,
As Carl pointed out the temperature has a lot to do with it too. One rating is at one temperature, and the other rating is at another temperature. That's a little strange but if you make a note of the temperature difference PLUS the fact that one rating is rms and the other is average, you find that the ratings are comparable. We can go into the math behind this if you would like to see how this works. Basically you would convert one rating into the other and then scale for temperature. You should come up with comparable ratings.