PowerSever (PB Edition) indicates the PowerServer provided in the Appeon PowerBuilder 2017 R2 Universal Edition, it supports mobile deployments on the .NET IIS application server only. Other PowerServer editions indicate the PowerServer (Developer/Workgroup/Enterprise Edition) provided by Appeon which supports both Web and mobile deployments on both the .NET and J2EE application servers. Notice the different components contained in these editions.

PowerServer Toolkit is only available in the PowerServer (PB Edition) only. It supports both the Web app deployment and the mobile app deployment, to both the 2017 R2, 2017, and 2016 PowerServer (formerly called Appeon Server).

The PowerServer component from PB Edition and the PowerServer component from Developer/Workgroup/Enterprise Edition must be installed on different servers. If you install them on the same server, unpredictable issues may occur, and you should uninstall both, and then install them separately on different servers.

Also notice the different features supported in these editions.