I want to provide the disclaimer that I'm an upper intermediate skier who gets down a lot of advanced/expert terrain and this is my opinion only. This review is not likely to apply to people who ski well all the time.
I jumped on a pair of Nordica Top Fuels(78 waist) the year they came out and love them. Still use them very often to this day.
Last season I wanted to try something wider and bought a pair of Volkl Mantras in a 184. I was lucky enough to experience 16 true powder days last season and due to believing snow reports, I only had the Mantras on 10 of them.
In powder/chowder the extra width of the Mantras was great and made skiing those conditions much less work and more fun. Once things turned to crud or less(read groomers), I missed the Nordica's. For me the Mantras tips flapped all over the place in these conditions and I could never feel comfortable on them even when standing on the front of my boots(tune not the issue). I sold the Mantra in the fall.
Enter the Watea94(almost exact same dimensions as the Mantra). I skied the Watea in powder/chowder/crud/groomers today and while I felt it the equal of the Mantra in powder/chowder, it was far superior(for me) in crud and on the groomers. It was stable and went where I pointed it and it never felt skittish or like it was riding me.
I've spent the last three seasons trying to eliminate equipment as a variable in why I suck and after getting my boots dialed in I'm almost certain I've found a wider ski(not wide) that lets me suck on my own without helping.
Keep in mind the Mantra and Watea are being compared in virtually the same conditions which amounts to excellent rocky mountain snow.
So it looks like I'll be on the Watea in 6" or more and the Nordica for everything else. YMMV