Thanks Clyde,
You may well find that most operators will prefer the kit that they selected. Why? Because they probably selected it on the basis of the product support not capability.
Most manufacturers are capable of producing anything you specify. My experience is that the product is very similar. The support, and you will need it, differs and ebbs and flows with time.
Ultimately, a police helicopter is a surveillance platform and is almost useless without functioning kit. Thats where the support comes in.
It also depends where you are in the world. When I worked in Europe, Eurocopter were well known for their product support, over here, they suck. (but are getting better as market share improves).
And YES I do know that EC probably don't do surveillance equipment, but if they did........