A: Hey, thanks for your question.

There's a few important differences between Advanced Themer and Microthemer. Advanced themer is a UI / UX extension for the Bricks page builder. Microthemer is visual CSS editor that can be used to style any WordPress content - not just Bricks content. It's purely focused on styling content with CSS.

I hope that helps. Please let me know if you have any further questions.

Cheers,
Sebastian