There are occasions where vinyl will have different lengths to a CD or digital edition. Best to take your timings from the real thing.
Even the written track times on vinyl can often be wrong.
Using a stopwatch on vinyl is really the only accurate way. MusicBrainz is about documenting the real music you have in your hand.
In majority of cases all the numbers will line up, but I could point out enough unusual cases to show this is not always a solid rule.
Even a stopwatch is going to be tricky to choose the exact moment a fade out stops…