Welcome!
I live in New Mexico and ride my fat tire rear hub Radrover and mid-drive Himiway Cobra Pro at 5000-7200ft elevation range. My Cobra Pro has 2X the tq compared to my Radrover and that is a big improvement in the foothills. I had my rear hub since 2016 and that was a very good first ebike to learn about 85%-95% of the ins/outs of ebiking. Switching to a mid-drive is usually an increase in riding skills, wider range of capabilities, expanding riding technique, increased maintenance, and higher purchase price. I find I have to ride my tq sensor mid-drive like a manual transmission (MUST down/up shift with any speed change) and my cadence sensor Radrover I can ride like an auto-trans (just pedal/throttle and go in any gear at any speed). You might have to decide if your riding environment, budget, yearly mileage, and current to desired skill level is better suited with a mid-drive or fine with a rear hub.
I ended on my back a few times on single track trails and some damaged parts with my Radrover when I upgraded from a regular pedal bike. My Radrover was easy to fix, modify for my riding comfort, ride in the rain, and it didn't hurt that bad when I nick/scratch the frame.