...What? That wasn't my point. :/
EDIT: To say more on this matter...I meant that the hard mode and boss rush aren't the only good things about DoS. Julius mode is also a great bonus.
Not really. Julius mode is a great extra mode, better than the whole of PoR (that's taking the extra modes into account).
And yes, the PoR extra modes suck. Only a masochist would like them.