However, for a comparison tool like the one you refer to, some customization ( through PHP, HTML, CSS, and Javascript code ), will be needed.
You can pass on the post IDs of the target comparison posts through the URL parameter to a new page, which includes a content template, that shows the field data from those posts accordingly.
I hope this helps and for more personalized assistance around custom code, you can also consider hiring a professional from our list of recommended contractors: https://toolset.com/contractors/
What if I utilize Woocommerce and a comparison plugin and filter. Would I be able to add custom fields with Toolset to be filled in Woocomerce products and dislpayed to clients on frontend. Clients only sees the info filled by me as specs (custom fields), not something they have to fill. So woocommerce becomes a catalogue.