That totally depends on what you are using your system for.
For gaming, you will see slight benefits in most games (1-2%), a significant benefit in a small amount of RAM intensive games, and absolutely no difference in non-RAM intensive games.
The best thing to do would be to find specific benchmarks for the games you play and make your decision based on that.
For Workstation applications, that RAM increase could have a very large impact on performance depending on the application.
For general home office use, there would be no point in upgrading from 8GB unless you frequently find yourself opening about 50-60 tabs on Google Chrome.