VFFS: 

The vertical form, fill and seal machine (VFFS) is an automated packaging system that can be used in all fields of the packaging industry and enables the efficient production, filling and sealing of bags in one compact and space-saving system. 

H3SS: 

Flow Wrapping, or Horizontal Form-Fill and Seal (HFFS) is the process of making a horizontal bag from a single roll of film. Heat is applied to the bottom and ends of the film to form a sealed, flexible package already filled with products. Flow wrap packaging is used for a variety of products. 

The process can be faster than FFS but offers less protection.