Husband and wife driving identical cars?

She wears the pants...

Same reason they fly in separate airplanes.

So their kids won't be orphans.

My bodyguards drive black Tahoes. We ride in them.

So I guess we have identical cars

Ya need to never ever gotta go to yo wallet
Long as I got rubber band banks in my pocket
Five six, rides with rims and a pocket kit
Ya ain't gotta downgrade, you can get what I get

they both like the same vehicle

maybe they own the dealership, have a close friend or family member that owns the dealership and they got a good deal.

Standardization - if one car is in the shop, or if a child or someone borrows one, etc.

There is a lot to be said for standarization. On the other hand, I'm in favor of having cars for different roles. A great vehicle for "getting work done" might not be the best for "Driving to New Jersey".

My parents both drove Suburbans for many years although they were different colors.

Walk into a dealership, test drive a vehicle. Tell the salesman, "if you can meet this price, I'll take two."

Baller move.