Is there a service that exists, which allows you to visually compare websites?

I want to be able to take a website at different Top-Level-Domains:

• www.nytimes.co.uk
• www.nytimes.com

And compare the two sites visually, side-by-side.

The above are just fake example.

I would need to compare several different websites at different TLDs. Preferably without coding anything, just pasting in some URLs.

Is there a service which exists like this?