I've run both set ups on different bikes over the years.
Profile on a mod,
Ffw on mods
Pro2 on stock and ffw on stock.
It all boils down to personal preference, it's no good someone saying yeh go ffw or rear free hub because you might ride it and decide you don't quite like the feel.
From what I've found reliability wise, the rated ones are just as reliable as each other. My tensile front freewheel never skipped once on me, my profile hub shell actually cracked and started to pull apart because of the spoke tension but again still never skipped just looked horrible.
Ride other people's bikes with various set ups and see what you think.