The eMTB market is booming! Almost every bike brand now has several eMTBs on offer and the range of options is steadily growing. But how do you navigate the jungle of products, different models, constant new releases and special offers to find the model that suits your personal riding style the...
ebike-mtb.com
Here's a good article to read. Take your time learning about the different aspects of ebikes, and the type terrain you think you will be riding. Then you can better select a bike that fits your needs. Don't choose by price alone, plus there's no need to rush, especially now. There happens to be a glut of bikes and major sales have just started to appear. More sales should be coming.
Cube is a good bike but has 27.5" tires. That's a good size, but larger 29" wheels will roll over rocks and roots more easily/smoothly. It's also a bit heavy. The Bosch motor is excellent and popular, but Bosch and Shimano motors make a rattle clunking sound when rolling on uneven ground and bouncing over obstacles. Nothing wrong, just inherent to the design.
Obea Rise H30 is a great bike and it's lighter weight makes it easier to handle and lift. But it's detuned Shimano motor is a little noisy and 2/3 the power of a full power Shimano or Bosch. That's ok if your climbs will not be super steep or you aren't trying to keep up with another rider with a full power motor. You will have to pedal more but the motor is not weak, just not as strong as a full power. Much larger battery than the Carbon Rise will give good range.
Trek Powerfly is a hardtail and won't be as comfortable or capable a bike with a rear suspension. Also, Treks are knows to have great but fragile paint jobs.
Canyon Spectral On is the most capable full power ebike on your list. The Neuron has less capable suspension and might not be as good for the long and high mt. rides you're thinking about. As another said, the Spectral has the option of a very large battery, so you can use higher power modes more and go further, but that also adds some weight which makes lifting harder. Also, the Shimano motor is great, but a little noisy. Think of this Canyon as a heavier Orbea with more power, range and capability. Remember that Canyon sells only so you need to check with them regarding warranty servicing. Are there local shops or will you need to pack up and ship to them?
If motor noise is important to you, look at Specialized with the Brose motors, and Giant with there own brand of motor. No clunking and smooth running. Some of the Specialized Levos are on sale now. Also some Giant Trance and Reign models are on sale. Again, take your time and test ride different bikes to get a feel.
P.S.- I just turned 70 and bought my first ebike 16 months ago, a Specialized Turbo Levo, Gen 3. Expensive but it's great and I love riding it. Beware that an emtb will need more maintenance than your 20 yr old non-e bike, so after purchase, you will spend occasionally on parts and labor. With power and more miles, drive trains, brakes and tires wear more quickly. All part of ownership. Enjoy!