I have playerd with xna for a week and I have liked it but I have also discovered that there are some engines like www.dxstudio.com, www.visual3d.net, torque and many others open source and commercial.

The big question is, whats the difference, only editing of the models and position, physics, etc? and in XNA I have to do all of that by hand, I mean by code?

Why should I use xna over an engine? I have seen some that are not expensive, 100$ to 500$.

Any other differences? Can I Integrate a project using xna and an engine at the same time?

Engines are a higher level abstraction over the top of XNA.

So XNA only understands how to draw things on the screen - it has no idea about what those objects are, how they interact with each other and the player.

Game Engines will give you level editors, collisions and lots of other things depending on the engine. You should use them becuase you are buying thousands of hours of expert coders experience. It will speed up your time to ship. Of course you have to ensure the engine can meet your needs and learn their API.

Most engines will give you low level access to the GraphicsDevice so that you can do things that the engine doesn't provide.

Heres a list of XNA based engines - I dont think DXStudio is XNA based. http://forums.xna.com/forums/t/12882.aspx

It also means that I can deploy to xbox live using the engine?

Thanks

Levalencia:

It means that I need both the xna framework and the engine installed on the same machine.

 

It also means that I can deploy to xbox live using the engine?

 

 

Levalencia:

It also means that I can deploy to xbox live using the engine?

No, you deploy to your Xbox using XNA Game Studio. You get your game onto the XNA Community Games by submitting it through this site once it goes live.