Which eufy smart lock is the smarter buy for your front door?

Display

Winner: Product B

Product A has a touchscreen keypad, which is practical and easy to use, but it is still just an access interface. Product B adds a camera and doorbell function, which gives you visual identification of visitors, deliveries, and suspicious activity at the door. For a UK homeowner, that extra visibility is a major security upgrade because you can verify who is outside before unlocking. If you want the more informative front-door experience, the E330 wins clearly.

Performance

Winner: Product B, narrowly

Both products are rated 4.2/5, but Product B has far more reviews: 3,352 versus 1,745. That suggests the E330 has been used by a larger pool of buyers, which is a useful sign when judging real-world reliability. Product A still deserves credit for its simpler architecture: fingerprint entry, keypad, Bluetooth, and remote control via Wi-Fi bridge are all proven, low-complexity functions. But in pure feature performance, the E330 does more, and its broader review base gives it the edge.

Build quality and design

Winner: Product A

Product A is the more traditional and robust smart lock. It is BHMA certified and carries an IP65 rating, which is important for British weather because it indicates strong resistance to dust and water ingress. That makes it a safer bet for exposed front doors, especially if your porch gets wind-driven rain. Product B is also designed for front-door use, but the added camera and doorbell hardware make it more complex and potentially more intrusive in appearance. If you want the most straightforward, weather-ready deadbolt, the T8510 is the better-built option.

Battery life

Winner: Product A

Battery life is where simpler is often better. Product A has fewer power-hungry components because it does not need to continuously support a camera feed, doorbell alerts, and video processing. Product B’s 3-in-1 design is undeniably useful, but that extra functionality usually comes at the cost of shorter battery endurance or more frequent charging/replacement. For homeowners who want fewer maintenance headaches, Product A is the safer choice. In a security device, reliability between charges matters more than flashy features.

Price and value for money

Winner: Product A

At £204.78, Product A is £10.71 cheaper than Product B at £215.49. That price gap is small, but Product A still gives you remote control, fingerprint entry, keypad access, Bluetooth, BHMA certification, and IP65 weather resistance. Product B justifies its slightly higher price by adding a camera and doorbell, which is excellent value if you would otherwise buy those separately. However, if you only need a dependable smart lock, Product A delivers the cleaner value proposition and avoids paying for features you may not use.

Game library/features

Winner: Product B

For smart locks, the equivalent of a better feature library is the range of useful functions bundled into the device. Product B wins because it combines a video doorbell, camera, fingerprint lock, and auto-lock in one unit. That means fewer separate devices, fewer apps to manage, and better situational awareness at the front door. Product A is still strong, with fingerprint access, touchscreen keypad, Bluetooth, and remote unlocking through the Wi-Fi bridge, but it is fundamentally a lock, not a front-door security system. If you want the most complete feature set, the E330 is the more capable package.

Overall user experience

Winner: Product B for convenience, Product A for simplicity

Product B offers the more complete day-to-day experience because it lets you see, speak to, and manage visitors from the same device that controls entry. That is especially useful for parcel deliveries, family arrivals, and monitoring unexpected activity. Product A is easier to live with if you prefer a lock that behaves like a lock: quick fingerprint access, keypad backup, and fewer moving parts to think about. In practical terms, Product B is better for people who want a smarter front door; Product A is better for people who want a dependable smart deadbolt with less complexity.

Overall summary: If your priority is front-door security and convenience in one product, the E330 is the stronger buy because the built-in camera and doorbell add real-world value. If you want the more durable, simpler, and slightly cheaper option, the T8510 is the better pure smart lock. For most buyers choosing between these exact two, Product B is the more complete solution, while Product A is the better no-nonsense lock.