- 
    Images Use Full-Size URLs
    
      - images are larger, so (by default) row height will be taller
 
      - link 
href matches image src (not sensible, but usage via a cms plugin create such markup if a user does not add links) 
    
   
  - 
    
  
 
  - 
    Images Use Thumbnail URLs
    
      - images are smaller, so (by default) row height will be shorter
 
      - link 
href is to a larger-size image than the image src (expected markup) 
    
   
  - 
    
  
 
  - 
    Grid is a List
    
      - this grid should look identical to "Images Use Thumbnail URLs"
 
      - the markup is different, though (this uses <ul> and <li>'s)
 
    
   
  -