FYC Track 2: The Attack on the Jakku Village Part 2
0:00-0:15 = not in OST
Incidental tremolo high strings with low hits.
0:15-1:34 = OST track 1, 5:03-6:23 OST
Not identical (horn parts are little bit different between 0:33-0:35 FYC and 5:21-5:26 OST; 0:50-0:54 FYC is omitted in the OST; and there are a few extra seconds from 1:04-1:08 in the FYC that are not on the OST), but certainly comparable. Presumably one is a revision of the other - maybe the film needed a few more/less seconds in particular spots, so Williams had to add/subtract a few measures from the original. Which is the original and which is the revision is impossible to tell until the film is released and I can study the actual soundtrack in great detail.
1:34-1:53 = not in OST
A little bit more of a tail to the track than in the OST. Mostly incidental bass rumbling.
The Music of Star Wars
These posts will help focus and develop my analyses of John Williams' film scores.