I don't really see much of an advantage in any of the bar placements for squats. High bar, low bar, front squat, whatever, just do squats. Rippitoes explaination for why low bar is better doesn't exactly convince me and I've heard arguments for all 3. So I just switch from time to time. Right now I'm on front squats.
And I'll reiterate the concensus here. The programs are very similar, pick one and stick to it. Although, power cleans are better than rows.