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It's probably closer to 80 once paypal or your card translates it, but anyway... the 772 has the newer 4 pawls freehub with a steel spline to prevent chewing... the freehub is also 11 speed (with spacer for 10-9) which means futureproofing your purchase as Shimano has pretty much given up on 10 speed, at least for road and CX. You might not care, but when it comes to re-selling anything which is 700c and not 11 speed ready is worthless. For the sake of 15-20 quid extra is a no brainer
Because 96 euros is about £75.