Specifically, I am looking at the nordica FA 84 EDT in 168cm and Head supershape rally in 177cm. I know, I know, I know... They are not directly comparable skis, but as I said, my dad has a quiver of skis already, so it is less about filling a specific role as finding a new frontside biased ski with some light crud/bump/steep ability that has the right FEEL.
Would anyone with experience on these specific skis be able to shed some light in regards to how manageable and maneuverable these two skis are in these specific lengths? For reference, he has liked 174cm Blizzard Magnum 8.7 Ti's and 177cm Mantras (96mm, pre rocker), and felt indifferent about 168cm Kastle MX88's, and could manage all those skis just fine on and off piste. For various reasons, all those skis are gone (gifted to a family member... Broken when hit by a snowboarder... Being sold...). As i said, he's got skis for different conditions, so I'm less concerned about different strengths and weaknesses in different types of snow as I am in overall manageability and that elusive FEEL good sensation.
Where would you rank the FA 84 EDT in 168cm, the freakishly grippy, bruiser of a front-side biased mid-fat at 84mm, and the rally in 177cm, the surprisingly versatile, softened technical carver at 77mm, in terms of maneuverability on groomers and small/medium moguls, as well as pure ice grip? Compared to the reference 168cm MX88, 174cm magnum 8.7 ti, and 177cm unrockered mantras? Thanks for your help!