After my intensively used scooter with hard rubber tires had passed away, it should be the comfort variant. Especially on uneven surfaces (cobblestones, gravel ...) the hard rubber tires were almost impassable. With the pneumatic tires of the ground is no longer a problem and the driving experience is like having shock absorbers. Great scooter!
Only the required by the higher rolling resistance additional effort (estimated 10%) is a bit annoying, but due to physical rules.