ScorpionGod saidVery right..I smell a pro :) ...both avada and enfold use bunch of jquery plugins , and bulk of CSS files .. it effect site performance ..I also have used both themes, but both doesn’t suite well in the terms of SEO. Website performance is one major OnSite SEO factor and both these themes are outputting many JS, CSS files in the Source Code.
Yes, Enfold is something better than Avada. However, I recommend you to checkout the Genesis Framework and its child themes. Those are the real SEO Themes in the market with simple setup.