When comparing Schemaball vs SQL Power Architect, the Slant community recommends SQL Power Architect for most people. In the question“What are the best relational database design and modelling tools?” SQL Power Architect is ranked 3rd while Schemaball is ranked 13th. The most important reason people chose SQL Power Architect is:
Can convert databases and copy the data from tables.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports reading schemas from multiple sources
Schemaball can read schemas from multiple sources such as SQL schema dumps, flat files or live databases.

Pro Interesting twist on visual interface
Gives a quick way to grasp an overview on the past/present complexity of the database (or group of tables) undergoing inspection.
Pro Convert
Can convert databases and copy the data from tables.
Pro OLAP schema modeling
Cubes, Measures, Dimensions, Hierarchies & Levels.
Pro Reverse engineering
Pro Drag and Drop
Cons
Con Visualizations may be hard to get used to
Since schemas are visualized by using stylized "schema balls" it may be hard getting used to them since they are so different from the other, more straightforward options.
Con The manual is not free
The SQL Power Architect User Guide costs $ 99.
