In pre-NGS server, on a DiscID page you can check track length with linked releases:
In NGS there's no way to compare:
http://musicbrainz.org/cdtoc/LgVu4.L6bnogkAdp1CCuFD63vSw- only lists release titles
Even the set track durations page http://test.musicbrainz.org/cdtoc/LgVu4.L6bnogkAdp1CCuFD63vSw-/set-durations?tracklist=675406 doesn't allow you to compare
Consequence: you do things blindly.