Both versions are great to have. Especially since the hump is an add on, we can build with or without. For the perfectionists, the aircraft numbers may be modified as well.
I have seen many Skyhawks around the world. With and without the hump are great.
Here are pictures I took while in Singapore. This one has no hump, but does have the bent refueling probe.
and even a crazy looking 2 seater with a separate aft cockpit to simulate a true single seat configuration.
Isaac