The Kasa KP115 is the clearer overall winner for most households. Its main strengths are energy monitoring, a compact design that fits better in real outlets, and more consistently positive feedback on setup and reliability. Its main limitations are 2.4 GHz-only Wi‑Fi and some app friction around energy totals and scheduling behavior mentioned by reviewers.
The HBN Smart Plug Mini’s biggest strength is value through quantity: a 4-pack can quickly add smart control to several rooms, and it supports the expected schedules, grouping, and voice assistants. Its biggest drawbacks are mixed connectivity/setup experiences, unclear instructions, and occasional reports of inconsistent behavior. If you want predictable setup and energy tracking, choose Kasa; if you need multiple basic smart plugs in one purchase, HBN can fit.