Opinions. Fact is, one can never know. Besides, there are THOUSANDS of variables to consider in ANY <insert name here> VS <insert name here> in the Star Wars universe.
For the Jawa's sake, Boba Fett could've killed Vader once. Doesn't make him more powerful, now does it? Jango Fett had the upperhand on Kenobi, and was beating him too. Does that make Jango more powerful than Kenobi ? Nope, it doesn't. You must consider the variables at play in any given matchup, and THAT'S what you (The canon-club) cannot for the life of you understand. Manchester United is technically the "best" football team in the world, does that mean they will beat ANY team, EVERY time? Nope, history has taugth us that much. Same rules apply here.