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Compare products on a page

Hello! I’ve been searching high and low to create a page like Apple’s compare (Mac - Compare Models - Apple)

When It comes to the dropdown list, do I have it jump to a section? Do I set it as pagination? I can’t wrap my head around this, it looks so simple but I can’t figure it out >.<

Appreciate your time and help!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)