I can only comment on the Flagship, the others I don't know. No speed limit with that lady, stable, fast edge to edge, I never had the impression, the 158 was hard to turn, charging groomers is fun and in deep fresh (I call 40cm deep
) it's pure fun, very good float. The fun declines in moguls though.
Is it good for tree riding? No idea, I never ride trees, so I don't know how a board needs to be to be good in trees. Hope, other members with a Flagship can comment on that point.