The better choice depends on where and how you’ll use a smart plug, but the Kasa Outdoor Smart Plug EP40 is the more complete single-device solution—especially for outdoor routines—thanks to IP64 weather resistance, two independently controlled sockets, and consistently praised app setup with sunrise/sunset offset scheduling. Its main downside is that reliability feedback is not universally positive, with some reports of early failures, and outdoor performance still depends on Wi‑Fi strength.
The HBN Smart Plug Mini 4-pack is a practical indoor value play: you get multiple plugs for multi-room automation, strong everyday on/off performance once configured, and useful grouping/family sharing. Its main limitations are more mixed setup/connectivity experiences and unclear instructions, so it suits households comfortable doing a bit of troubleshooting.