We recently purchased two new ebikes. We are very new to ebikes and although I did a lot of research on the first purchase (Rad Rover), I felt I was much better informed on our second purchase (
Specialized Como 3.0). Riding an ebike for just a couple of weeks gives you a good feel for what you like or dislike about a bike.
1) Rad Rover was an internet sale with a $1,499.00 (no tax/shipping) price point. I like this bike for the comfort, more upright riding position and fat tires (smooth ride). Also great on hills. This is a rear hub motor with a throttle. Has 12 magnet candice sensor. This is one of the lower priced ebikes. My initial research showed this bike as a great value.
2) Specialized Como 3.0 was from an LBS with a $3,200.00 (before tax). I also like this bike for comfort, more upright and balloon tires (smooth ride). Also, great on hills. It is a mid motor with no throttle, has a torque sensor. This price point is probably middle of the stream for ebikes.
I like both! Both are fun to ride and very comfortable. Both are great values for their respective price point.
There are differences. The Specialized is a better built bike (quality and parts). Torque and Candice sensing is very different. Throttle or no throttle can be or not be a big difference depending on use. The specialized is over 10 lbs lighter.
There are many bikes that meet your requirements you cited such as comfort, hilly riding and
light off road trails.
I would suggest you see if you can ride as many bikes prior to purchase if possible. This may be a challenge depending where you live but I wish I had done this prior to my first purchase. Try a throttle versus no throttle set up. Try hub versus mid motor as well as torque versus candice. A lot of bikes will have different feels.
I would also suggest buying from a local bike shop over internet sales. I did both and so far everything is OK, but in the long run the LBS will better serve you in the long run (set up/tuning/warranty/repairs). In most cases, a higher budget will yield you a better bike. There are things I am wanting to upgrade on my Rad Rover, I don't feel the way about the Como 3.0. Remember-You get what you pay for.
Good luck on your search.