What is the difference between services/classes in angular2

Service itself is a class. I think you want to know what is a difference between model and service

 

The very basic difference between Model and service is the term injectable. So basically when we create service we make it injectable. We register service as provider in app.module.ts. And there after we don't need to instantiate it.

 

We can inject the same in any component and can use it.

 

Whereas model, we can consider the same as entity object.

 

If we are dealing with api we can parse API data transfer object to model and play around that.