Maybe on second thoughts I'll junk that line for white against the Albin. Yes it's probably better for white, but the win looks very uncertain. Better to take black out of book.>>>>
Yes, I agree it gives what you say. Maybe I'll try it. The moves are all very logical and if black fails to follow that line, presumably white gets a better advantage still. But I think black may have excellent drawing chances irrespective odf the fact that two bishops against two rooks are strong. I am suggesting it may be drawn. I might be wrong.
I think white does have a nice edge here, a reliable += with zero chance to lose is nothing to spit at. If you're looking for more than that, try 5.a3. That's what strong grandmasters usually play these days.

There's an idea behind everything ... even behind bad moves, or else they wouldn't be played. f4 is slow and it cramps white more than black but that's only my opinion. You say white scores 41% but does that say anything? How many games with this continuation are on the database and were they mainly played against inferior opposition, for instance? So mere percentages don't tell the story.