Comparison Theme with Two Authors, anyone?

Hi, guys!

Can anyone point me to a theme or plugin that would let me have side by side posts like this: https://deown.it/?

Ideally, something responsive, as well.

I’ve actually already tried contacting the owner of the site I linked to above, but he says theirs is on a CMS called Kirby, so unfortunately, they couldn’t help me.

Thanks in advance!