I have had both types of bikes and sold the rear hub powered bike for a mid drive 250 wH one that weighed 43 lbs less. The key factor for hills is the nM or Newton meters of force the motor can provide to assist the pedaler going up a hill. I use my mid drive 26 lb e-bike to ride everywhere and the motor provides up to 25% of the power used on these rides. The battery provides enough juice for 12 or more hours of riding in this manner.
With the mid-drive the bike's tires, front and rear, are no more difficult to change than for a normal bike which is quite different than for a bike with a rear hub drive motor. One can carry a phone and have an account with Uber and request a pickup with a flat tire and fix it at home or have it done at a bike shop, but I prefer to fix it on the road and continue with my ride.