Agreed. Maybe re-purposed or extra? Possibly some extra graphics? Maybe that is just how the maintenance division rolls in style. Got some small LEDs on it, I wonder what color.
Here is a photo of one of their two rescues (they are identical to one another). So it is similar to that, however from what I know M1 was purpose built / bought for it's duties
Funny the maintenance unit has a chrome grill and the rescue has black grill Looks like they are different years. It is personal taste. Seeing alot more black accents on fire vehicles including black Q sirens and wheels