Do you mean that you have created one and the same strategy with EA Studio and with FSB Pro? And you see different balance lines?
It depends what you have in the strategy, but keep in mind that the strategies in EA Studio open on Bar Open. And in FSB Pro, the strategy can open inside the bar. So it works differently. The EAs check for signals at different time, which leads to different orders. This is why it is reasonable to see such a difference.
The experience I encounter is when I’m using TradingView. Different type of charts leads to different performance when using the same indicators. I wonder we can do the same via EA Studio or FSB. I would like the system to calculate the performing indicator based on Heiken Ashi chart.