Hi! In Spain we call this kind of thing trading de divisas, and you’re asking very good questions.
Too-profitable EAs can be risky — they may be overfitted to historical data. Besides trades and profit ratio, check drawdown, equity curve smoothness, and out-of-sample performance.
FSB Pro doesn’t support portfolios like EA Studio, but you can run multiple EAs manually.
You can’t import FSB collections into EA Studio — different formats. But yes, EA Studio is more user-friendly for trading de divisas.