Comparing data in profiles
We are running Google Classic alongside Google Universal. The two are running different properties.
Is there anyway that we can either compare data between the two, or somehow export the old data from Google Classic into Google Universal. We did not update our Classic to Universal but instead started new.
Re: Comparing data in profiles
You could export two views showing the same time period and compare those, sure, but please remember it's never advised to have two instances of Google Analytics running on the same site.
Google Classic was 100% upgraded to Universal Analytics so you must be running analytics.js or a variation on Classic Analytics.
You can use this guide to help upgrade: