eBike technology explained

Hey everyone!

I'm diving deep into the world of eBikes lately, specifically trying to understand the tech behind them before I make a purchase. I'm looking at a commuter eBike for my 15-mile round trip, mostly flat but with a few decent hills, and the sheer variety of motor types, battery capacities, and sensor tech is a bit overwhelming.

Could anyone here shed some light on the real-world differences between hub motors vs. mid-drives, or torque sensors vs. cadence sensors, especially for someone who wants a smooth, natural-feeling ride? What tech features should I prioritize for efficiency and longevity? Any insights would be super helpful for navigating the buying guides!