Bit misleading but I don't think the image is what was actually purchased. That's a concept car from CES.

What they've purchased are the "Ford E-Transit Battery Electric Vehicle", which AFAICT look pretty much identical to the standard Ford Transit vans that are ubiquitous all over the US.

I’m just guessing, but…

Significantly smaller. They are designed to be stopped on small oneway roads while still leaving enough room for a full sized vehicle to pass.

It’s also somewhat reminiscent of the existing fleet of last-mile carrier trucks:

https://thumbs.dreamstime.com/z/usps-mail-delivery-truck-bac...

The concept shown has wonderful visibility.

Some places are mandating designs along these lines for pedestrian safety.

My wife thinks they’re cute.