Cliente de Conexão de Área de Trabalho Remota vs. Área de Trabalho Remota
Eles parecem ter a mesma funcionalidade.
No entanto, eles são para versões diferentes do OSX. Veja abaixo.
Microsoft Remote Desktop Connection Client para Mac versão 2.1.1
Published 5/5/2011.
Remote Desktop Connection Client for Mac 2.1.1 lets you connect from your Macintosh computer to a Windows-based computer and then work with applications and files on the Windows-based computer.
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Operating System Versions: Mac OS X version 10.5.8 or a later version of Mac OS.
Note: Microsoft Remote Desktop Connection Client for Mac (version 2.1.1) is not supported for use with Mac OS X v10.7 (Lion) or later.
Fonte Cliente de Conexão de Área de Trabalho Remota da Microsoft para Mac Versão 2.1.1
Área de trabalho remota da Microsoft
Version 8.0.15 Updated: Mar 20, 2015.
With the Microsoft Remote Desktop app, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help you get your work done wherever you are.
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Compatibility: OS X 10.7 or later, 64-bit processor