Okay let's talk about the quality

Bitcoin talk consists of a lot of different quality posts because of the merit system to filter out the quality and shit post.

Crypto talk is full of shit posts but still the moderator of that forum doing their best to become a quality forum.

Number of members
AFAIK the bitcoin talk is the winner on this.

Bitcoin talk - Post to learn
Crypto talk - post to earn.

This is just my personal opinion and personal perspective only.