When comparing Schemaball vs DbDesigner, the Slant community recommends DbDesigner for most people. In the question“What are the best database design programs?” DbDesigner is ranked 6th while Schemaball is ranked 15th. The most important reason people chose DbDesigner is:
Has lots of templates with example database designs.
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 Templates
Has lots of templates with example database designs.
Pro Reverse and forward engineering
Supports MySQL, PostgreSQL and Oracle reverse engineering.
Support for MS SQL and SQLite is planned.
Pro Generic design
Can create a "generic" design for all supported databases.
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 Beta
Seems to be in beta status.
