Google Photos Unlimited Storage, At Reduced Quality

SO, I was curious how 'reduced' the quality was going to be on the Google Photos Unlimited Storage offer.  They claim anything up to 16 megapixels is essentially unchanged.

So I posted a photo to the unlimited storage, compared it to an iPhoto export and to the original JPEG.

Google reduced the file size to 1.1 megabytes.
iPhoto Export reduced the file size to 2.2 megabytes.
The original photo was 4.4 megabytes.

All photos remained 16 megapixels in size at 72dpi.

But how does it look at 100% crop?

See for yourself - which image is original, and which came from Googles' compression?

I'm satisfied.





(spoiler: Left is Google, Center is original, right is iPhoto export)