If Jango hadn't have been trampled by the reek, the battle between him and Mace would probably end in a draw, in my opinion. Boba, however, would probably beat Mace, when he was 14 he fought Mace to a stalemate. Mace didn't win, in my opinion, they both got some good hits on eachother, and when Palpatine ended it, Mace had his saber aimed at Boba and Boba had his flechete aimed at Mace. Either one of them could have gotten off the fatal shot. And if anyone still insits that Mace won, then you will probably still acknowledge that Boba put up a good fight, having punched Mace several times, and hit hima few times with is flechetes, so think what he could do as an adult against Mace.
SF
Boba: Lord Vader, I bring good news.--Vader: You have captured Solo?--Boba: No.--Vader: Then what is it?--Boba: I just saved 15% on starship insurance by switching to Geiko! {MW}