Hello Thomas,
Here are the main differences:
EA Studio:
- it is a web-based strategy builder
- it is possible to run many generators on one and the same computer, on different tabs/browsers
- it has the Reactor, Validator, and Normalizer (tools not available in FSB Pro)
FSB Pro:
- it is possible to use custom indicators
- higher time frames could be used as filters (you can trade on M15, and filter on H1 or D1, for example)
- You can generate/build strategies with up to 24 rules
Both programs are very useful. They are different and combining both of them works the best.