I'm not doubting that Jango would've trained Boba to be a badass, but his personality wouldn't be the same. Jango was a former Mandalore and would've instilled certain Mandalorian principles in him, like the need for family and brotherhood. Without this heritage and with out anyone to truly rely on Boba formed into a very cold and solitary man, but it also made him insanely driven and independent. I like that about him. His icy demeanor and his utter relentlessness.
Yea. of course he couldnt be the same person as Jango since they havent had the same lives or met the same people. or same experiences. That's not what I meant x) I just meant the part of learning how to become a badass bounty hunter ^^ but I think he taught Boba lots of stuff before he died too