Hi Unai,
Starting with generated code - MATLAB can produce C/C++ code and executable programs for your algorithms. You can write algorithms programmatically by using MATLAB or graphically in Simulink environment, and generate code for MATLAB functions and Simulink blocks that are useful for real-time and embedded applications.
Quick Start Tool helps you prepare a model for generating this code. It applies the parameter changes to your condiguration set (collection of values for the parameters of a model) and generated the code.
While, Code Generation Advisor checks the designing and troubleshoots the Simulink models that you want to use to generate the code (the checks are mentioned in the doc).
Conclusing the answer, Quick Start Tool helps to apply a few (hyper-)parameters to generate your code, while Code Generation Advisor checks that you do not get into any trouble while generating the code.
