They were a different species yes known as The Taung, but they became extinct and the Mandalorian culture was picked up by humans and the like. So yes...Jango/Boba are Mandalorians....infact Jango(I just remembered this) was actually Mandalore by Ep 2 and he still got his tail kicked by Obi-Wan and then killed by Windu so that just makes his defeat even sadder that the best of them couldn't tango with a Jedi Master on two accounts.
This brings up another question, did Jango/Boba train with melee combat yet? using a blaster isn't a smart move against a jedi. Usually they would use their ancient blade of a lightsaber, innercore color black, outer color white if I remember correctly.