Boba has a bit more skill. That's rather obvious. He fought Vader multiple times and never got killed-(Keep in mind Vader killed a great number of Jedi, and trained with Sidious.), survived the Sarlacc 3 times, and has collected much more notorious bounties on people such as Han Solo. He's also surprisingly skilled with a lightsaber. While Jango was bested by Mace Windu. Though Jango has bested Dooku's apprentice, and his rival Mandrogoro.[spoiler]I think I butchered his name. But he was a Mandalorian as well.[/spoiler]