I don't think anyone will ever know how big a difference there is between the Sensor Swab material and the PecPad material. I am sure that they wouldn't sell many Sensor Swabs if they couldn't create some fear. I wouldn't be surprised if the Sensor Swab material were indeed superior for cleaning sensors. However, the PecPads work just fine.
The important aspect of sensor cleaning is to remove all gritty particles before wet cleaning.
Thanks for digging up the manufacturer's statement. Certainly food for thought.