The presentation is different, but as far as difficulty, I'd say about the same. Perhaps slightly easier, in that the bass line and the melody are usually quite distinct and easy to follow. There are some tricky fingerings, here and there, but that's true in Ozzie's book also.
Go for it! And do take the trouble to listen to the cd instruction measure by measure. That's part of the method, painstaking as it is -- you will be rewarded :-)