The 1640 rifles chambered in 9.3X62 are not very common here. Guess the Swedes kept them... anyways, they usually are much more expensive than the average 1640, just like the 1651 chambered for the .358 Norma Magnum.
When they specify "sporter" it may be either an ex-military M/94 actions (bent bolts often Stiga or Vapen-Depoten) but it also can be a Husqvarna model 46 made from unissued M/94, especially if it's a rechambered 9.3X62 (from a original 9.3X57).
When they specify "Commercial", it's an early 640 rifle, made from unissued M/38 actions, with the "solid wall" receiver. Later 640 were made on FN M/98 actions.