F-35 vs – Both the F-35 Lightning II and the Su-57 Felon are fifth-generation stealth fighters, but they were built around different priorities. Comparing stealth, sensors, air combat performance, strike capability, and operational maturity points to a clear overall edg
The first thing pilots need in modern air combat isn’t a bigger missile load or a sharper turn—it’s the moment of being first seen. or first unseen. With the F-35 Lightning II and the Su-57 Felon. that question splits down the middle: one aircraft is optimized to shrink the radar picture and stitch together battlefield awareness. while the other is built to hit harder with speed. maneuverability. and close-range fight-making.
On paper. both are fifth-generation stealth fighters capable of carrying weapons internally. evading enemy radar. and engaging targets across multiple domains. But their designers chased different “wins.” The F-35 was built around stealth, networking, and battlefield awareness. The Su-57 emphasizes speed, maneuverability, and long-range air combat.
Stealth: the F-35’s biggest advantage
Stealth is the defining characteristic of a fifth-generation fighter—and it’s where the F-35 holds one of its clearest advantages. The aircraft was designed from the outset to minimize its radar signature. Its airframe, engine inlets, weapons bays, and radar-absorbent coatings work together to reduce detectability. Open-source estimates place the F-35’s radar cross-section at roughly 0.001 to 0.005 square meters.
The Su-57 incorporates stealth shaping and radar-absorbing materials too. But the design includes trade-offs in favor of aerodynamic performance. and most estimates put its radar cross-section significantly higher than that of the F-35. The result is stark in practical terms: while the Su-57 is certainly harder to detect than older Russian fighters such as the Su-35. the F-35 remains the stealthier platform.
Sensors and situational awareness: who gets the first picture
Modern air combat increasingly turns on who sees whom first. The F-35 is built around that reality with a sensor suite that fuses inputs into a single, usable picture of the battlefield.
The aircraft’s AN/APG-81 AESA radar works alongside the Electro-Optical Targeting System (EOTS) and the Distributed Aperture System (DAS). The goal is straightforward: pilots receive information without having to interpret data from multiple sensors manually. This sensor fusion capability has often been described by pilots as the aircraft’s greatest strength.
The Su-57 carries the N036 Byelka AESA radar and multiple infrared search-and-track systems, giving it impressive detection capabilities. What’s less clear is how sophisticated and mature its sensor-fusion architecture is. Most analysts agree the F-35 currently sets the benchmark for situational awareness among operational fighter aircraft.
Air-to-air combat: the Su-57’s claim to fame
If the fight is reduced to raw performance, the Su-57 has a compelling argument. It is faster, with a top speed exceeding Mach 2, compared to the F-35’s Mach 1.6. It also features thrust-vectoring engines that enable extreme maneuvers.
Those capabilities could matter most in a close-range dogfight. The F-35, however, was never intended to be a traditional dogfighter. Its design centers on engaging threats at long distances before opponents can respond.
Still, if combat were to devolve into a visual-range engagement, the Su-57 would likely hold an advantage thanks to its superior agility and energy performance.
Strike capability: modern warfare favors the networked stealth shooter
Both aircraft can strike, but the F-35 is built for the kind of contested missions that dominate modern planning.
The F-35’s multirole design allows it to perform a wide variety of missions. including air superiority. precision strike. intelligence gathering. and suppression of enemy air defenses. It can carry precision-guided weapons internally while maintaining a low radar signature. which becomes especially important when targets are heavily defended.
It can also share targeting information with other platforms, effectively acting as an airborne command-and-control node.
The Su-57 is capable of conducting strike missions as well. But the F-35’s combination of stealth, sensors, and networked warfare capabilities gives it a notable advantage when attacking heavily defended targets.
Operational maturity: numbers and experience still weigh heavily
Beyond design, there’s the hardest question: how much combat time does the aircraft have behind it?
More than 1,200 F-35s have been delivered worldwide. Across multiple air forces, they’ve accumulated hundreds of thousands of flight hours. The fighter has participated in real-world operations and continues to receive regular upgrades.
The Su-57 remains in the early stages of deployment. Publicly available figures suggest fewer than 50 aircraft have entered service, and its combat experience remains limited.
That gap in operational maturity doesn’t erase the Su-57’s strengths. It just means the F-35 has already proven its value in a wider set of real-world conditions—and keeps improving.
The decisive takeaway: different strengths, one clear winner
The Su-57 is a highly capable fighter that excels in speed, maneuverability, and close-range air combat. It represents Russia’s most advanced fighter program and remains a formidable aircraft.
But modern air warfare is increasingly dominated by stealth, sensor fusion, networking, and the ability to detect and engage threats before being seen. Across those areas, the F-35 consistently demonstrates stronger performance.
The Su-57 may have an edge in a traditional dogfight. but the F-35’s superior stealth. battlefield awareness. strike capabilities. and proven operational record make it the more capable overall platform. In a contest defined by the realities of modern warfare rather than air-show maneuvers. the F-35 emerges as the stronger fighter.
F-35 Su-57 stealth fighter sensor fusion AN/APG-81 EOTS DAS N036 Byelka thrust-vectoring operational maturity air-to-air combat strike capability