Pros: Very quick turning and lively
Cons: Soft snow bias so edge grip not as strong as some other stiffer skis
I am 5 7", 154 lbs and an advanced skier (double blacks). Tried the Head Rev 98 170 cm on a demo day in Whistler in spring conditions and loved them. Found them to be light feeling, lively, very quick to turn and a ton of fun. Not as grippy as say the new 2015 Mantra or maybe even the Bonafide but a much more enjoyable ride than those two if you are not a charger.
Of the other two, I preferred the Mantra (170 cm) which has a damp solid feel underfoot and is very stable at speed but still carves well and is reasonably lively. I found the Bonafide (173 cm) heavy and reluctant to initiate although the payoff was rock solid stability once up to speed on the groomers but you don't buy skis these wide for groomers and the Bonafides felt like a lot of ski to haul around. tried them in fairly firm mid size moguls too and they still felt big. Maybe a bigger heavier skier would have liked the Bonafides better but for my money, the Rev 98 would be my choice, especially in soft snow conditions.