Sam, I can't really compare both concerts, they were unique, each one of them.
On both of them I felt that it was as close as I'd be of really witnessing a LZ concert....but in both moments I was also aware that they were not THE Led Zeppelin. The P/P concert was the 100th concert they made on that tour...I'd say Jimmy, Robert, as well as Michael Lee and Charlie Jones had, at the time, worked out some of the weak points that have possibly happened by then. They were amazing, the concert was fantastic, but they weren't Led Zeppelin.
The O2 concert was a kind of dream-come-true event....but no matter how good they played, it was the first and only concert they made, so they didn't have the chance to real "oil the engine"....they were amazing, to be completely honest, better than I have expected. I was taken by the moment, and I haven't heard any boot on the concert so far...but I can say they were fabulous.
Yet they were not Led Zeppelin.
Well, I'm not an expert on boots, sooooooooooo far from it, the live recordings weren't what kept my love for the band alive for so many years. I wouldn't ever be able to judge a band, no matter how good they were on the studio, based on a live concert. Even Led Zeppelin had really bad moments back on their heyday.
All I can say is that those two concerts you posted the links of, well, they were fantastic.
And I love them for sentimental reasons.