Options are used for adding capabilities such as "User-Agent".
Example in C#:
var options = new PhantomJSOptions();
options.AddAdditionalCapability("phantomjs.page.settings.userAgent",
"Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20100101 Firefox/25.0");
using (var driver = new PhantomJSDriver(options))
{
//code
}
Services are used to modify behavior of your PhantomJS instance, such as hiding the command prompt or for disabling loading images.
Here's a list of all services.
Example in C#:
var service = PhantomJSDriverService.CreateDefaultService();
service.HideCommandPromptWindow = true;
service.LoadImages = false;
using (var driver = new PhantomJSDriver(service))
{
//code
}