Upper and Fit

The Nike Alphafly 3 has the better upper. Its fit is exceptionally secure and race-focused, wrapping around the foot without feeling restrictive. The laces and heel structure provide excellent lockdown, and the upper adapts well to the shape of the foot.

The Feidian 6 Ultra also has an excellent bootie-style upper, with good breathability and lockdown. However, it feels slightly roomier and runs a little long. For that reason, runners between sizes may want to consider going down half a size.

Winner: Nike Alphafly 3 — 5/5
Feidian 6 Ultra — 5/5

Outsole and Grip

This is where the Feidian has a clear advantage. Its outsole provides excellent coverage and impressive grip, even on wet surfaces. The Nike offers good traction too, but its thicker rubber and greater areas of exposed foam make it feel less refined.

The Alphafly's outsole also contributes to its characteristic loud, slappy landing sound.

Winner: Feidian 6 Ultra — 5/5
Alphafly 3 — 4.5/5

Midsole and Energy Return

Both shoes use highly advanced PEBA-based foams and carbon-plated systems, but their rides are noticeably different.

The Alphafly 3 combines ZoomX foam with its Air Zoom pods and carbon plate to produce tremendous energy return and marathon protection. It is extremely effective, although its ride can feel somewhat mechanical.

The Feidian 6 Ultra feels more dynamic and bouncy. Its Super Boom foam, capsule construction, and distinctive carbon-plate configuration produce particularly strong forward propulsion. When the pace increases, the Feidian seems to reward a more aggressive landing with an impressive rebound.

Winner: Feidian 6 Ultra — 5/5
Alphafly 3 — 4.5/5

Stability

For super shoes, both models are surprisingly stable. They have reasonably broad platforms and enough structure in the upper to keep the foot secure.

The Alphafly may have a slight advantage in overall stability, but the difference is small.

Feidian 6 Ultra — 4/5
Alphafly 3 — 4/5

Durability

The Feidian's extensive rubber coverage suggests strong durability, although more mileage is needed to make a definitive judgment.

The Alphafly 3 has held up reasonably well but shows some creasing and wear. It is durable enough for a racing shoe, but it isn't exceptional in this category.

Feidian 6 Ultra — 4/5
Alphafly 3 — 3.5/5

Speed

Both shoes are extremely fast, but the Feidian 6 Ultra has the edge. Its combination of bounce, aggressive rocker geometry, and forward propulsion makes it particularly effective when running quickly.

The Alphafly remains excellent from 10K through the marathon, while the Feidian feels more versatile and capable of working extremely well even over shorter distances.

Winner: Feidian 6 Ultra — 5/5
Alphafly 3 — 4.5/5

Value

Neither shoe is cheap. Both sit firmly in the premium super-shoe category, making their value questionable at full retail.

However, the Alphafly 3 has become considerably more affordable, making it the better bargain if you can find it around the discounted price mentioned in the review. The Feidian becomes much more compelling when its price drops substantially from launch pricing.

Feidian 6 Ultra — 2.5/5
Alphafly 3 — 2.5/5

Which Is Better for the Marathon?

This is the closest part of the comparison because both shoes are outstanding marathon racers.

The Alphafly 3 remains incredibly efficient and protective over 26.2 miles. Its Air Zoom pods and ZoomX foam provide a distinctive combination of cushioning and propulsion, and its upper is arguably one of the best in the super-shoe category.

But the Feidian 6 Ultra takes the overall win. It offers a similarly aggressive racing experience while adding even more bounce and forward propulsion. It also has superior grip and a more natural-feeling ride.

Final Verdict

The Li-Ning Feidian 6 Ultra wins this head-to-head.

The Nike Alphafly 3 is still an exceptional marathon shoe and remains particularly attractive if you can find it at a heavily discounted price. Its fit is arguably superior, its stability is excellent, and its performance over long distances is proven.

However, the Feidian 6 Ultra feels like a genuine evolution of the same basic super-shoe philosophy. It combines a highly responsive PEBA-based midsole, aggressive carbon-plated geometry, excellent traction, and impressive energy return into a package that feels faster, bouncier, and more engaging.

For runners who loved the Alphafly, the Feidian 6 Ultra is a very compelling alternative—and, based on this comparison, arguably the more advanced shoe.

Overall winner: Li-Ning Feidian 6 Ultra.