Actually..
Most of the Collections and Streams are compatible and a lot of base stuff
The real divergence is in anything dealing with the underlying OS; both GUI and File IO. Since each Smalltalk was written to fit a different sort of problem from a different philisophical direction, they have differen tways of implementing the relationship with their environment.
Which is actually a good thing. Dolphin and Visualworks have different goals they try to attain, so they have different ways of meeting those goals. So the developer can choose the approach that makes more sense for their own particular problem
