I understand there is a lack of alternatives, and there is not a better place for up to date information.
But, in the light of Bitcoin and what it represents, neither of these platforms promote the same ideologies.
You answered your own question in your first sentence. And you're right that these platforms don't promote the same ideologies, they promoted all ideologies of the entire bitcoin community. Reddit doesn't have some stance on bitcoin, nor does Bitcointalk...they're infrastructure, not people.