Abstract.  The research compares the patterns for user interfaces Model View Controller (MVC) and Model ViewView Model (MVVM) using .Net technologies for the system development for sales and purchasing management of a company. The inductive method is used to recognize, obtain and measure the results of  performance and productivity variables based on the tests of two prototypes created for the MVC and MVVM pattern. For the performance tests we used: performance measurement tools Visual Studio 2012 Ultimate. The obtained results show that MVVM pattern presents better conditions of performance and productivity meeting the 95.1% of its performance levels with respect to the MVC pattern that fulfills the 41.6% of its performance levels in relation to the performance and productivity with a level of significance of 95% and a margin of error of 5%.