It may come down to cost: the Vello set is $80, the Kenko set $200. On the Kenko set web page at B&H Photo Video they show the Vello set as "similar item at savings." I called them twice and spoke to two different salespersons on different days; both recommended the Vello set even though they sell both sets. So I guess I'll just have to make a final decision and go with it. I do have a tripod now.