Continuity mistake: On the mission to the abandoned medical station, Sabine wears forearm armour and an extra belt with two large pouches, as she usually does on missions. When she and Ezra are in the ducts, the second belt and forearm bracers disappear in a few shots.
Continuity mistake: During the first scene in the Ghost's common room, there is a shot where the wall to the right of the galley door is visible. The wall is blank. In the first season episode "Idiot's Array", it was shown that Sabine had decorated that section of wall with a starbird painting. When the section of wall is seen again in the season 3 episode "The Holocrons of Fate", the painting has returned.
Answer: Not every military vehicle looks or is built exactly the same, even if they perform similar functions. Different defense contractors would have their own particular designs. Newer vehicles often have improvements or additional capabilities added.
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