The major aim of MSPhysics is to improve gaming in SketchUp. One thing that SketchyPhysics lacks is having control over all mouse and keyboard operations. Microsoft Windows API has a feature called Hook Procedure. Hook Procedure allows monitoring and making decisions to the messages reaching a window procedure. This advantage allows processing of all mouse and keyboard messages, without SketchUp shortcuts interfering. For example, a mouse wheel that is, by default, a shortcut for a zoom in/out command could be instead used as a controller to switch weapons in an FPS game. All mouse clicks and keyboard buttons could be processed without having to create a focus redirecting control panel. All in all, this feature allows MSPhysics to be independent from shortcut commands, which is very suitable for developers who seek to create FPS games with more control over user input.
MSPhysics is not the new version of SketchyPhysics. MSPhysics is written completely from scratch, integrating the latest NewtonDynamics Physics SDK. Yes, it does have a similar functionality to SketchyPhysics, but that was done so that SketchyPhysics users wouldn't have hard time transitioning to MSPhysics.
MSPhysics implements the latest NewtonDynamics physics SDK, making it faster than SketchyPhysics by a significant factor.
MSPhysics has a very powerful scripting API and a well documented scripting documentation.
MSPhysics has more and better joints than SketchyPhysics.
MSPhysics is compatible with Mac OS X 10.6 or later. Some of the features, such as receiving keyboard and mouse events, are limited, but most of the other general features are up and running just fine.
MSPhysics uses NewtonDynamics physics engine made by Julio Jerez. NewtonDynamics is responsible for calculating all the collisions and physics operations. NewtonDynamics is known for its accuracy and stability.
MSPhysics is not compatible with SketchyPhysics. Both plugins may be installed alongside, but each will act as a separate tool; all attributes differ. To have a particular model working on both, MSPhysics and SketchyPhysics, assign similar scripts and properties to the model, through MSPhysics and SketchyPhysics UIs. Note that SketchyPhysics may lack the features of MSPhysics and vise versa.