I can't speak to that directly, but we did an A/B test with paid search traffic a year or two ago.
I was sure that a simpler, faster-loading home page would do better than a complex rich home page. So we drove paid search traffic to two versions.
The complex home page has *multiple* carousels, a social media "wall" that pulls in recent FB and IG posts, scrolls for screen after screen. The top carousel takes forever to show an image because first, the page has to load the script loader (require.js), then the script loader requests the scripts (JQuery, JQuery plugins, the carousel JS). Meanwhile, all the crap injected from GTM jumps the queue and loads all manner of tracking crap that competes with the script loader. Then the slider script lazy loads the images. No critical path rendering optimization. It's a MONSTER.
The pared-down page stripped out all of that. Static images, no carousel, no social wall, nothing above the fold that requires loading a script (menus require scripts to function, but not to display the top level), much shorter, much quicker both perceptive load and effective load. Should convert way better.
Anyway, I was proved wrong. The simpler page converted slightly worse than the monster.
If we had more traffic, the next step would be multivariate analysis, because clearly it wasn't the slower load times that lifted conversion. But which bell or whistle was it? Was it different for everyone? I don't know that. All I know is that the massive, complex, image-filled, script-heavy page out-converted my simpler test page.