The difference is that Pi is apparently normal, up to all extensive existing evidence. The Universe is not normal. Anyway, Physics doesn't preclude Helms Deep.
I think normalness is a stronger property than "possesses all sequences of the alphabet of its digits", since it means that + "all subsequences are equally likely"
Naw man, physics still apply, you dont get gandalf just because you went a few million light years toward Andromedia