The pair were level on points going into the final event of the season and met in the quarter finals for a winner-takes-all battle.
Pagès has pushed the sport to incredible new levels with his innovative tricks this season, but his signature Alley-Oop Flair was his downfall, as he crashed in the quarters.
Moore however stomped a flawless run before going on to beat Maikel Melero of Spain in the next round and sealed his third victory of the season against countryman Rob Adelberg in the final.
The triumph completed an unbelievable year for Moore, who only advanced past the quarter finals for the first time at the 2015 season opener.
“This feels like all the hard work and determination has finally paid off,” said Moore. “This was always a dream and the dream has come true now.
“Tom is a legend of the sport – he’s the biggest innovator and always pushing us to new boundaries. He’s unlucky he went down.”
The 15th season of Red Bull X-Fighters will be remembered for Pagès' insane progression as much for Moore’s win, just as the 2014 season conjures up images of Josh Sheehan, who came third in Abu Dhabi, landing the first double-backflips seen at the competition.
As well as the new Alley-Oop Flair, the French rider perfected his Bike Flip and body varials and promised more new tricks next year.
But Moore had some bangers of his own, busting out big tricks like the Volt and the first ever Bundy flip with a no-handed landing in the UAE, and fully deserved his first title.