I've been flying the NFX for about a year now and have just picked up the Manga so I guess it's time for a review/comparison.
The NFX sport
I stole a quick go of Malte's (Sonnenwind) NFX in Berck and minutes later had one of my own.
Flown with an offshore breeze at a couple of miles an hour it's absolutely awesome, inland you'll have to work flying it in less than 5mph. At about 2m it's a small kite and remains light and flicky in stronger breezes, but can load up and cut corners and track should you want it to (meh).
It's strength is it's ability to float on it's back or in a fade giving you time and confidence to go for that "one more" repetition.Hovering at waist height you can Jacobs Ladders and string combos together endlessly.
Multilazies are laughably easy and the backspin and barrel roll are nicely manageable. It's competent enough at pitch based stuff but not stupid pitchy...you will have to move. The nose pops forward reliably for copters or yofades.
All in all it's a trick monster and doesn't punish poor inputs
Bad points: Axels and flatspins are typically ugly and comets and cascades require careful input.
Construction looks quite nice but on closer inspection you notice c-clips aren't glued, seams not finished and the Centre-T hole cut straight through without even so much as a drop of glue. Spar ends looked rough and of the few we've had down at Purley, none of them have had the same frame specs.The worst offender had one wing larger than the other.
However no-one buys an R-sky as a collectors item and it's how it flies that counts
The Manga
First impressions were that I hated it. It isn't a pimped version of my NFX and doesn't fly like it.The sail profile is different, the spars longer and the bridle set super heavy and loose. Not at all what I was expecting or wanted.
After a while though I started to connect with it and found that it had greatly improved 540s, slots and axels, an awesome backspin cascade and even better JL combinations.
The Manga appears to suffer from the same sewing issues as the Sport and I've noticed they've done away with hot cutting altogether and now nibble at the dacron instead...it's a labourious method but makes each one a unique and special item.
What I can't live with is the lack of drive and shocking Level-7esque oversteer. Strangely it'll power up and track cleanly, then have you pumping and stomping backwards the next second. After some bridle modding it's flying quite nicely but has lost some of that lazy feel that was so nice.
If you've tried the NFX and liked it, don't expect the Manga to be similar. It's wonderful and appalling in equal measure.
My opinion only YMMV