I have completed 80% of UWorld and I have read RR Path cover to cover and have listened to all of the goljan lectures one time through...just to give a lil credibility to my opinion.
RR path has a LOT more than UWorld has in terms of path.
However, in terms of difficult UW path-type questions integrating pharm, embryo etc... there is a lot either a) not mentioned in RR path / Goljan audio, or b) not presented in a clinical problem-solving scenario as UW does.
So...I believe that UW Cannot Replace RR Path / Goljan, and vice versa.
However, I am fully aware that you do NOT need RR Path to pass Step 1.
DIT uses First Aid, UW, and their own Handouts (which do very well in filling in additional detail) - and the avg for their program is a 230+.
I have completed 50% of DIT lectures + handouts, and I feel that this lofty claim is accurate.