Why are xx54 and xx34 firmware revisions so much larger than xx64 and xx84 revisions?
The xx54 and xx34 firmware revisions contain firmware updates for two boards (T-LIL and T-LIV). The xx64 and xx84 firmware revisions contain firmware upgrades for just a single board (T-CAL). Read this for more information on the topic. Note the firmware revision numbers are different between the T-LIL and T-LIV boards (e.g., 1039 and 1035 for T-LIL but 1010 and 1004 for T-LIV). During the firmware upgrade process, the Samsung display determines which firmware revision to use. No action is required on your part.