The picture is a bit deceiving as they are in different parts of the throwing motion. But, yes Rodgers has a more compact throwing motion, but he also has 15+ years of NFL coaching that has changed his throwing motion.
I recall McCarthy talking about Rodgers throwing motion after he was drafted and how they worked on him lowering his arm so that it is a more natural motion.
It will be interesting to watch how Love's throwing motion changes over his career.