Well to answer your question, I guess it really depends on what you are doing. Herewith is a brief description of the products:
• BCC 8 includes over 200 2D and 3D special effects and Titling filters, all of which utilize the host native user interface, which means that you are up and running with the filters without having to learn a new UI set up. Many of the filters that are included with BCC 8 use the After Effects 3D cameras and lights, which enable the generation of true 3D scenes. All of the filters are MP enabled, some render in hardware using OpenGL with vertex and pixel shaders and all feature state of the art algorithms. Each of the filters comes with factory installed user customizable static and animated presets.
• RED 5 is a compositing application that can be used either as a plug-in or as a standalone compositor. It excels at the generation of 2D and 3D titles and effects. It includes all of the BCC 7 filter effects as well as many compositing effects such as live vector text, vector paint, vector trace and extrude, motion tracking, auto-animation, spline masking etc etc. RED 5 has a custom user interface. RED includes a couple of thousand customizable factory installed preset templates.
• Blue is similar to RED in that it's a plug-in compositing application, which can also be used as a standalone application, however Blue is 100 percent OpenGL hardware rendering so it's easier and faster to generate and render 3D composites. Blue also has a custom interface. Blue also comes with factory installed preset templates to make the product easy to use and learn.