Summary

Rose use UML as modeling language. This is mean team member can use one language to communicate with each other.

Rose Enterprise Edition has multilanguage support, letting you build components in mixed languages.
Rose supports C++, Java, and Ada, as well as 4GLs such as Visual Basic.
Rose generates interface definition language (IDL) for CORBA applications and data description language (DDL) for database applications.

Rational Rose allows you to move easily from analysis to design to implementation and back to analysis again, and thus supports all phases of a project's lifecycle.
Rational Rose supports a dynamic change-management process with forward engineering, reverse engineering, and model updating features that allow you to alter your implementation, assess your changes, and automatically incorporate them in your design.

Rational Rose supports teams of analysts, architects, and engineers by enabling each to operate in a private workspace that contains an individual view of the entire model.
Multiple engineers can work on complex problems concurrently; changes are made available to others by checking them into a configuration-management and version-control (CMVC) system.
A protected workspace means that one person's changes won't affect the whole model until the time comes to share these alterations with the rest of the team.
Rose integrates with major CMVC tools, including Rational ClearCase and Microsoft SourceSafe, and is open to other CMVC systems.

The Model Integrator acts as a visual model difference and merge tool. It supports smart merges, in that it uses the least common denominator to auto merge changes. It can act as a ClearCase type manager for Rose models but can be used with any CM system. The strength of the model integrator is that it can merge up to 7 parallel contributors automatically and merges 90%+ of changes with no human intervention - only true conflicts needs intervention.