Using the Javascript V3 Driving directions service from Android

[sgiddings]

Over the last two years, I have developed a web site using the v3 javascript maps api.
I am now in the process of developing the equivalent functionality in a native android app using the native Maps Api.
I am at the stage where I am incorporating the itinerary functionality.

Knowing that there existed the Driving directions web service, I started looking at the format of the call.
I was surprised to see that it does not have the same level of functionality as the javascript version.

So here is my question : is it possible to use the url of the javascript version to obtain the same level of functionality ?

What is missing in the web service ?
- indicate if a waypoint is a stopover

I also have the impression that the javascript service is faster, but that may just be me.