I wouldn't have my flail if it took me twice as long to mow as with my RC. I suspect that it's grass type and blades where people have struggles. I have hammer flails, so maybe that's why I can mow faster? Cut quality is about as good as the RC, and better overall without clumping. And when mowing along ditches there's no comparison- RC sucks, flail with side-shift makes this easy and fast.
Summary:
Tractor: Kioti NX5510 - 55hp, PTO 43hp
Fail: Nova Tractor MXZ220 - 7', 1,200 lbs
RC: 6' Bush Hog 286(? escapes memory right now- it's an older one) approx 1,000 lbs