All right, I finished my breakdown of the end credits music. I’ve separated each track into sections and determined the running time of each section.

The Jedi Steps [0:00 - 1:37] (1:37)
The Force Theme [1:38 - 2:11] (0:33)
Luke’s Theme / Main Theme [2:12 - 2:20] (0:08)
Rebel Fanfare [2:21 - 2:31] (0:10)
Luke’s Theme / Main Theme [2:32 - 2:57] (0:25)
Rey’s Theme [2:58 - 4:10] (1:12)
Kylo Ren’s Theme [4:11 - 4:55] (0:44)
Pursuit Theme [4:56 - 6:04] (1:08)
March of the Resistance [6:05 - 8:34] (2:29)
Force Theme + Rey’s Theme [8:35 - 9:14] (0:39)
Rebel Fanfare + Ascending Tones [9:15 - 9:31] (0:16)
Rey’s Theme (Bars 3 and 4) [9:32 - 9:39] (0:07)
Final Chord + Luke’s Theme [9:40 - 9:58] (0:16)

OST “The Jedi Steps and Finale” (8:52) (Source: Spotify)

The Jedi Steps [0:00 - 1:37] (1:37)
The Force Theme [1:38 - 2:11] (0:33)
Luke’s Theme / Main Theme [2:12 - 2:21] (0:09)
Rebel Fanfare [2:22 - 2:32] (0:10)
Luke’s Theme / Main Theme [2:33 - 2:57] (0:25)
Rey’s Theme [2:58 - 4:10] (1:12)
Kylo Ren’s Theme [4:11 - 4:55] (0:44)
Pursuit Theme [4:56 - 6:04] (1:08)
March of the Resistance [6:05 - 7:26] (1:21)
Force Theme + Rey’s Theme [7:27 - 8:05] (0:38)
Rebel Fanfare + Ascending Tones [8:06 - 8:23] (0:17)
Rey’s Theme (Bars 3 and 4) [8:24 - 8:31] (0:07)
Final Chord + Luke’s Theme [8:32 - 8:48] (0:16)

Blu-Ray/Digital (12:41 of music) (Source: Movies Anywhere. I can determine whether the digital version matches the Blu-Ray this weekend. I strongly suspect it does.) (EDIT 2/2/2020: It does match. The copy I used to check was the standard Blu-Ray disc from the American Collector’s Edition 3D Blu-Ray box set. If anybody comes up with another home video release that differs from this breakdown, PM me.)

The Jedi Steps [2:04:55 - 2:06:31] (1:36)
The Force Theme [2:06:32 - 2:07:05] (0:33)
Luke’s Theme / Main Theme [2:07:06 - 2:07:15] (0:09)
Rebel Fanfare [2:07:16 - 2:07:26) (0:10)
Luke’s Theme / Main Theme [2:07:27 - 2:07:51] (0:24)
Rey’s Theme [2:07:52 - 2:10:11] (2:19)
Scherzo for X-Wings [2:10:12 - 2:11:51] (1:39)
Kylo Ren’s Theme [2:11:52 - 2:12:35] (0:43)
Pursuit Theme [2:12:36 - 2:13:44] (1:08)
March of the Resistance [2:13:45 - 2:16:14) (2:29)
Force Theme + Rey’s Theme [2:16:15 - 2:16:54] (0:39)
Rebel Fanfare + Ascending Tones [2:16:55 - 2:17:12] (0:17)
Rey’s Theme (Bars 3 and 4) [2:17:13-2:17:19] (0:06)
Final Chord + Luke’s Theme [2:17:20 - 2:17:36] (0:16)
Bad Robot / Lucasfilm Logos [2:17:37 - 2:18:02] (0:25)

To summarize the differences:

Rey’s Theme is extended by about 1:07 on the digital/Blu-Ray compared to the FYC and OST.
The digital/Blu-Ray inserts Scherzo for X-Wings between Rey’s Theme and Kylo Ren’s Theme. Scherzo for X-Wings is absent on the FYC and OST.
March of the Resistance is shortened by about 1:08 on the OST compared with the FYC and digital/Blu-Ray.

Bottom line: if the FYC is actually what played over the theatrical version’s credits, then the Blu-Ray has to have been extended by ~2:43 - 2:46, lining up nicely with the reports of a three-minute credits extension. That’s a big “if,” though, so I need corroboration from someone who has access to a theatrical copy that includes the credits (if such a copy exists).