Cute! Very interesting comparison, it shows how fast baby bunnies grow up. I can confirm that your Holland Lop is a (possible VC) lightly marked Japanese (orange/black) Harlequin.
Harlequin is not a color that can be shown, but I'm sure you are still interested in quality. I do not show bunnies myself, and I am learning more everyday! But from what I can tell, he has a nice round top line, with good slope. His ears are nice and open, but they are on the longer side (it is possible he could grow into them, though). He does have longer bone, too, which is seen via the length of his front paws. Ideally he should have short, straight, and heavy bone. He lacks proper crown definition, and his forehead is narrow - a good Holland Lop should have a "massive" head! He does have striking bold round eyes, and thick ears that hang close to his head. I could go on and on, but hopefully this gets the main idea across! Although he does not have perfect type, he is beautiful nonetheless and will most likely grow up to be a nice looking Holland (to be used in a breeding program, or as a pet). Hope this helps!!