eBike technology explained

Hey everyone!

I've been riding my Aventon Level.2 for about six months now, mostly for my 15-mile round trip commute with some decent hills. I'm constantly amazed by how different brands seem to implement their motor and battery tech, even for similar specs. What are some of the key technological differences you've noticed between major eBike brands (like Bosch vs. Shimano vs. Bafang, or even proprietary systems) that really stand out in terms of ride feel, efficiency, or reliability? I'm curious what makes one system "better" for certain applications than another.