Both are collections of short anime clips made by Studio 4°C. Both have each episode made by different persone and some people worked on both Fluximation and Digital Juice. Both have mainly artistic purpose and both can be a bit trippy but still enjoyable.
Both are OVA that are collection of short, indipendent on themselves stories, each with different animation and story done by different people. Some can be a bit trippi and some stories from Digital Juice and Sweat Punch are made similary.