Majorly x Mostly - Qual a diferença?

"It said that Dr. Willian Lane Craig in his debate with christopher hitchens has accurately refuted all his arguments to sustain atheism, especially dute to a survey made at the end of the debate with participants that had majorly/mostly said that were leaving the event more convinced about god's existence"

What's the diffrence (If any) between both words?

Obs: I moved from my native city, that's why I wasn't active in the forum anymore, but I'm back.