Lossless image optimization high on upload or pagecrunch but not on wordpress

When I do a manual upload of an image to your site or I do pagecrunch in both cases using lossless optimization my image reduces significantly like 50K on a 70K+ image. But in when doing it through your WordPress module I get like 5K worth of compression.

https://www.ads-software.com/plugins/kraken-image-optimizer/