Hello,
The performance of both the page builders is the same with our theme.
We will give the edge to Wp-Bakery bakery page builder as we use it in all of our demos and it has various premade templates integrated with woodmart.
Elementor does not have theme-based elements https://xtemos.com/docs/woodmart/shortcodes-2/ A lot of templates are built by means of these elements.
WPBakery page builder is considered to have a wider range of options and Elementor is a bit faster.
You can choose what you want as per your satisfaction and you should choose that in which you have grip and experienced before.
Best Regards.