For me, I feel like the big difference was around taking action, more than the other two. I heard about EA years ago, but only took action when I had already developed the habit of doing a good deed, however small or unimpactful, each day. Acting on a moral impulse, for me, became habitual. So when I revisited EA, I decided to actually start donating, because the move from "Someone should do something" -> "I should do something" -> Doing something had become much more a force of habit for myself.
I guess the lesson for this is that for people like me, something like Try Giving and committing just 1% of income or something small would have been a solid entry point, getting me into the habit of doing good.
I still cannot say with confidence that I value what is true above what is convenient. I just feel pretty detached from my past self/identity/opinions, which makes it easy to accept when my past self/identity/opinions were wrong. If all your beliefs are detached from your identity they just don't feel important enough to make you bend over backwards to defend them from valid counters.
I could be wrong but I think that is a lot easier to do than becoming someone who stoically seeks truth at all costs. I like to let the truth come to me and accept it like everything else.