Good Question
This comes from a few areas
- Specialized equipment and subversions firearms (Policing, Anti-terror, Riot, and SWAT organizations tend to have preferences or equipment that focuses on extreme accuracy) There is also a lots of Police only weapons
- Police organizations differ around the world the three major examples being Russia, China, and USA as there organizations have military like organizations and equipment. But there equipment is not always used by there respected countries military.
- In enlisted WarThunder’s Sibling game there is a form of Class system SWAT units (names differ between countries) could be a unique middle to top tier unit that specializes in urban and interior warfare.
- Addition of Riot gas and other special non lethal weapons that can push you out of cover
Special vehicles
Falcatus armored car
Cadillac Gage Ranger
Dillon Tactical Vehicle
The Rook
Royal Malaysian Police Unit Tindakan’s Mobile Adjustable Ramp System
Police Hummer
Overall with infantry mode it opens the door to support equipment and vehicles that have no home in ground RB but would have a home in Infantry as a support vehicle or a special or unique guns like the New Nambu M60. Overall there are lots of law enforcement / anti-terror organizations with interesting unique equipment. You would not bring a Cadillac Gage Ranger to fight a T-80 but you can use it as a first spawn with your squad to capture a building without being lasered by a light MG.
Thanks though for the question.