You don’t need to and to be honest it’s not recommended. Both EE and CE are using Robot Service differently and it can makes your robot to run into issues with two services active at the same time.
The better way is to use Enterprise Edition and enable the beta feed. Then you will be able to download beta packages to your Studio and check it’s features
That’s exactly why we don’t recommend to have both version of Studio at same PC. You will have a problem with licensing and so on. Regarding “help” this have only the latest stable version description. That’s why for beta package we are posting information here on forum. For the latest beta you can see it here:
What about Robot service? It also need to run at same level and path as Studio. It’s not that simple as it seems to be. You asked the question and I just answered that it’s not recommended. It’s up to you what and how will you do this. I just wanted to explain that this may provide to issues.