How are V4 Surf2 and V5 Surfacing similar?
This is a very broad subject, but let me assure you that any surfacing that you were capable of doing in V4 can be done in V5. Most of the command inputs are the same, only the Interface and some naming has changed. V5 has capabilities that V4 never had, but it requires an in-depth study of the tool set. If there are specific questions or examples that interest you, feel free to ftp them to me.