Pixelated images

I've used the same photos for 2 different websites. For some reason, the photos on madisonjane.com are not as sharp/pixelated than the same photos on madisonjanehomes.com

Could this have to do with a compatibility issue with the theme on madisonjane.com AND smushpro??

If you look at the sidebar picture, it is very pixelated. :slight_frown:

What do you suppose is causing this issue?