Based on the source code BIRT developed a more advanced development environment - Actuate OpenText Analytics Designer.
It has several advantages over BIRT. for example, Union DataSets allows you to merge several datasets into one, which is very difficult in a standard BI.
Distribution by reference below
a description of the differences here Open Source vs commercial OpenText BIRT, a comprehensive explanation - YouTube
I remind that at the moment OpenText Analytics Designer is not compatible with TSCO.
I suggest to consider the application of OpenText Analytics Designer in TSCO