Hi there.

1. with custom fonts plugin - if you are using google fonts it's the same as as including as directly linking google fonts

with custom fonts the font files are sent from your server.

You have more control, I would say

2. Elementor has a bit of overhead in terms of a large app/builder however is tightly integrated with their editor.

It's not necessary to use Custom Fonts Plugin, most of the time work well with Gutenberg. Plus you have the customizer -> typography section that let you change the fonts for elements on the fly.