If mental rotation doesn't play a role in Pool: Yes then the test would not be able to explain certain skills of Pool Players, which would be a result anyway.
no, no: if mental rotation plays a role, then you can expect those differences because of what we know about this field since more then 40 years! Just look into the research regarding mental rotation and gender differences...
Since few people here have ever researched a technical topic, you might consider giving us an overview of what people have discovered in the last 40 or so years.