The generated source code is less lean than that of Bricks (see F12 console). Also, Bricks is available as LTD, so elementor is more expensive AND the builder/editor ist much slower. I would therefore trust Bricks more, even now that the new version 2 has been released. For my part (WP beginner), I'm currently only considering whether I should stay with Gutenberg or switch directly to Bricks. But Elementor was too slow and is too expensive for me.