Yeah, you can spot the difference in their backgrounds - the younger guys on the Gas Gas and KTM are enduro riders learning to use trials techniques, but the guy on the Husaberg is an old trials rider.
the young guys are still gripping the bike with their legs, letting the bike move a little forward and back, but not sideways, while the older guy is staying loose (almost bow legged) and letting the bike move in all directions as required...