createSnapshotTask with SE-sparse disk type

In Vmware's Horizon View Linked Clones are of a disk type SE-sparse.

Is there any programmatic way to take a snapshot (basically linked clone) and to have it use the se-sparse type?

We currently use this API call but there is nothing there that mentions the type.

A good option for me if an API call is not possible to convert it to that type somehow (vmkfstool?). anything like that possible?

Bottom line is that with our current setup, each snapshot's block size is 512 bytes which causes us a lot of performance issues. We would love to some how have them be 4k (sesparse) and without using Horizon View.

Thanks.