CadnaR & options CAL + VIS + ORG + AUDIO
Complete package for all areas of application and general use.Recommended for acoustics experts, as it allows you to calculate sound pressure level, reverb time, intelligibility speech index (STI) and other parameters. It allows you to fully visualize and streamline results and offers complete functionality for the management and organization of projects, import formats, source and receiver types (including 2D and 3D mesh calculations and receiver chains). Native 64-bit version to manage even complex projects with RAM-intensive use. CUDA calculations using your NVIDIA graphics card.
CadnaR & CAL + VIS + ORG + T
Like Recommendation No 1, but without auralization and with calculation results obtained limited to sound pressure level and reverb time (T20 and T30).It is the best choice for most office and industrial applications if the calculation of levels and reverb time is sufficient.
CadnaR & OFFICE + VIS + T
Recommended for calculating sound pressure levels and reverb time (T20 and T30) in individual receivers and receiver chains. Functions selected for efficient project management and organization, such as grouping. Calculation and display of results in 2D meshes, use of high-resolution bitmaps (bmp) (e.g. such as distribution plans) and display of the calculation with particle animation in 3D view.More cost-effective package for offices and industrial applications with limited size and complexity.

You can see the details of each of the options individually in the following article:
CadnaR Options