I don't know if it's better, but the tempi are - indeed - faster on his "live" recording. Just as an f.y.i., it's been issued on the expensive Testament label, and not on BBC Legends. What's interesting to me is that Barbirolli starts each of the first three movements at tempi that fairly close to those on his EMI studio recording, then speeds up somewhere along the way. I think that the "live" one is a somewhat better performance, but the studio one definitely sounds better.
Barry