Experian FICO and Experian ScoreX are two different scoring systems. Experian FICO uses Experian's data and Fair Isaac's algorithms; Experian ScoreX uses Experian's data and Experian's algorithms.
ScoreX is much less transparent than FICO, so, if it does change, they won't tell us. Almost everythig that we know about how ScoreX is calculated we know from observing Prosper listings, not from anything Experian has said.