[meesterdude]

I've used gatling on a few redesigns with success

https://github.com/gabrielrotbart/gatling

I have some tweaks i was going to merge in that gave the diff's as %'s (so you could ignore small differences like fonts being different) as well as animate between the two versions. On my TODO was grabbing the actual element style attributes and then actually just diffing that, so the differences would be more or less spelled out.

Still, cool stuff!