In this video Luke is explaining the benefits of using a VST (Voice Systems Technology) coffee basket verses your regular basket. First thing you'll note about the VST is that they are far more expensive than the regular and with good reason.
The VST addresses the lack of quality and consistency in the filter-basket manufacturing process and they are designed as a filter basket with precise dimensions, standardised filter holes and a target dose mass for each basket. You can actually feel and see the difference in build quality with a quick side by side comparison. The VST feels a little heavier and more uniform in it's appearance than the cheaper counterpart.
The most notable difference you'll see Luke demonstrate in our video is in the extraction and how greatly it improves it.