iPhone SE 4 vs iPhone 15: New Budget vs Old Flagship
Published on
The iPhone SE 4 shouldn’t exist. A phone with an A18 chip, Face ID, USB-C, and Apple Intelligence support starting at $429? That undercuts Apple’s own iPhone 15 while matching or beating it in several key areas. Something had to give — and we spent a month figuring out exactly what.
If you’re shopping in the $400-500 range, this comparison matters more than any flagship face-off.
Design: Finally, a Modern SE
The SE line’s biggest problem was always its recycled design. The SE 3 in 2022 still used the iPhone 8 chassis with Touch ID, thick bezels, and a 4.7-inch screen. The SE 4 fixes this entirely. It adopts the iPhone 14 body — 6.1-inch OLED display, Face ID, flat edges, and a notch (not Dynamic Island).
The iPhone 15 has Dynamic Island and slightly thinner bezels. In daily use, the difference is minor. Dynamic Island shows live activities and ongoing timers, which is convenient but not essential. The SE 4’s notch is functional and perfectly adequate.
Build quality is where the iPhone 15 pulls ahead. Aluminum frame with Ceramic Shield front and color-infused glass back. The SE 4 uses aluminum and glass too, but the fit and finish feels marginally less premium. You’d only notice holding them side by side.
For a broader look at how the SE 4 fits into Apple’s lineup, our iPhone SE 4 review covers the full picture.
Performance: The SE 4’s Secret Weapon
Here’s the twist that makes this comparison fascinating: the iPhone SE 4 runs the A18 chip. The iPhone 15 runs the A16 Bionic. The budget phone is two generations ahead in silicon.
In benchmarks, the SE 4 is roughly 25-30% faster in CPU tasks and 35% faster in GPU tasks. More importantly, the A18 chip supports Apple Intelligence — the full suite of AI features including writing tools, image generation, notification summaries, and Siri with context awareness. The iPhone 15 with A16 does not support Apple Intelligence.
This is the single biggest differentiator. If Apple Intelligence matters to you, the SE 4 is your only option under $500. The iPhone 15, despite being a flagship-class phone, is locked out of Apple’s AI future.
Camera: Where the iPhone 15 Fights Back
The iPhone SE 4 has a single 48MP rear camera. The iPhone 15 has a 48MP main camera plus a 12MP ultrawide. That second lens matters more than most people think.
The main cameras produce very similar quality — both use computational photography effectively, both handle portrait mode well, and both shoot excellent 4K video. Side by side, the iPhone 15’s main camera produces marginally warmer tones, while the SE 4 leans slightly cooler. Both are excellent.
But the ultrawide’s absence on the SE 4 is noticeable. Group photos in tight spaces, architecture, landscapes — the ultrawide captures scenes the main camera simply can’t. Once you’ve had an ultrawide, losing it feels like a significant downgrade.
The front camera situation is interesting: the SE 4 actually has a 12MP TrueDepth camera that’s slightly newer than the iPhone 15’s 12MP shooter. Selfie quality is comparable, with the SE 4 producing marginally better skin tones in challenging light.
Display: OLED Both, But Different
Both phones feature 6.1-inch OLED displays. The iPhone 15 hits 2000 nits peak outdoor brightness. The SE 4 manages 1600 nits. In practice, both are perfectly readable in direct sunlight, but the iPhone 15 has a bit more headroom on the brightest days.
Neither phone has ProMotion. Both run at 60Hz. Both support HDR content. Both have True Tone. If you’re coming from a 120Hz phone, both will feel like a step down in scrolling smoothness. If you’ve never used 120Hz, you won’t miss it.
Battery and Charging
The iPhone 15 has a 3,349 mAh battery. The SE 4’s battery capacity hasn’t been officially disclosed by Apple but appears to be around 3,200 mAh based on teardowns. In our testing, the iPhone 15 lasts about 45 minutes longer in mixed use — not a dramatic gap, but noticeable if you’re a heavy user.
Both support USB-C charging, both support wireless charging, and both support MagSafe. Charging speeds are functionally identical.
Software Longevity
The A18 chip in the SE 4 means it’ll likely receive iOS updates for 6+ years. The A16 in the iPhone 15 is already two generations behind, suggesting 4-5 more years of support. Both will be supported well past the point where most people upgrade, but the SE 4 has a longer theoretical runway.
For context on the SE 4 in Apple’s broader strategy, our iPhone 16 vs iPhone SE 4 comparison breaks down the value gap.
Storage and Value
The SE 4 starts at 128GB for $429. The iPhone 15 started at 128GB for $799 but now sells for $599-650 as the previous-generation model. Even at the discounted price, the SE 4 undercuts it by $170-220 while offering a faster chip and Apple Intelligence.
The value equation is stark. The SE 4 gives you more processing power, AI features, and modern connectivity for less money. The iPhone 15 gives you a better camera system, slightly better build, Dynamic Island, and marginally better battery life.
Our Verdict
Buy the iPhone SE 4 if: budget matters, you want Apple Intelligence, you can live with a single rear camera, and you value longevity.
Buy the iPhone 15 if: camera versatility is important, you want Dynamic Island, you need the best possible battery life in this price range, or you found a great deal on a refurbished unit.
Honestly, for most people buying new in 2026, the iPhone SE 4 is the better purchase. The A18 chip and Apple Intelligence support future-proof it in ways the iPhone 15 can’t match. The camera system is the only real sacrifice, and for many users, the single 48MP lens is more than sufficient.
iPhone SE 4 on Amazon (paid link) (paid link)
iPhone 15 on Amazon (paid link) (paid link)