Difference between feathered and synthetic shuttlecocks

If you leave out the durability factor that is the obvious reason for synthetic (aka plastic) shuttlecocks' existence, following are some more differences between the two -

1. synthetic shuttlecocks fly more slowly on initial impact with the racquet, but slow down less towards the end of their flight compared with feather shuttlecocks that fly a lot faster on initial contact but slow down faster as they drop
2. on the clear shot feather shuttlecocks drop straight down, whereas the synthetic shuttlecocks never quite return to a straight drop falling more on a diagonal