Yes, originally bought a Crossfire which is now my wife's bike and I have a Cube Cross Hybrid with the Bosch crank drive. The Bosch is smoother in my opinion - unsurprising as it has more inputs (cadence, speed and torque) and does clever things like momentarily stopping assistance on gear changes. Of course, it was some £500 more than the Crossfire. Both do the job well. Depends whether you want to pay more. I mix some fairly rough off roading on Dartmoor with a lot of cycling on very hilly Devon lanes. The Cube is better off road (bigger wheels, semi-knobbly tyres, better frame) but the Crossfire's motor is fine off road too, the bike itself is just better suited to road use. For off-road a crank drive gives better weight distribution when coping with the technical bits. In terms of hill climbing etc there is little difference. The Crossfire motor may be fractionally quieter - probably because it is behind you. So - if you just want a bike for road use and gravel and don't want to spend that extra money the Crossfire is a fine bike. Want to get a bit muddy? Look for a crank drive.