Ethiopia OOB Question

[Karagin]

Unit 322 and Unit 324 are the same aircraft, with 322 having a start date of 1975, the same as 324, but an end date of 1997, whereas the 324 has an end date of 2025.

Their stats are the same across the board with exception of the end dates. So are they meant to be two different units?

[DRG]

Originally 322 was just an Otter and 324 was a twin Otter and at some point in the last decade they were both made "twin"

I have removed 322