Apple's M4 chip has arrived, and the MacBook lineup looks more impressive than ever. But if you're eyeing a refurbished M3 MacBook, you might be wondering — is it worth paying more for the M4? We put both chips side by side to help you decide.
Performance: How Big is the Gap?
The M4 chip delivers roughly 20–25% faster CPU performance over the M3 in real-world tasks like video export, code compilation, and AI-driven workloads. For everyday tasks like browsing, document editing, and video calls, the difference is virtually unnoticeable.
GPU performance sees a similar uplift, making the M4 a meaningful step forward for creative professionals working in Final Cut Pro, Blender, or Lightroom. But for most users, the M3 handles everything with ease.
Battery Life
Both chips are incredibly efficient. The M3 MacBook Air gets up to 18 hours of battery life — already class-leading. The M4 squeezes out a bit more under light workloads, but in daily use the difference is marginal. Both will comfortably last a full workday without a charger.
If you're coming from an Intel MacBook or an M1/M2, even the refurbished M3 will feel like a massive leap. Don't let the M4 hype push you into overspending.
Memory & Storage
Both generations start at 8GB unified memory, though Apple now recommends 16GB as the baseline for AI features in macOS. If you're doing heavy multitasking or running large language models locally, opt for 16GB on either chip. Refurbished M3 models with 16GB are available from $899.
Price Difference
This is where refurbished really shines. A brand new M4 MacBook Air starts at $1,099. A refurbished M3 MacBook Air in Grade A condition starts at around $749 at ReNu Tech — saving you $350 for a chip that's only marginally slower in daily use.
Our Verdict
If you're a video editor, developer, or power user who needs every ounce of performance — the M4 is worth it. For everyone else, a refurbished M3 MacBook is an outstanding machine at a significantly lower price. The best laptop you'll ever buy doesn't have to be the newest one.