Crosswalk and ionic

Hi there, I have a built setup that builds my app with crosswalk for Android < 5 and system view for >=5

For <5, I do a ionic browser add crosswalk

I noticed that also exists. Does anyone know if this is different from doing ionic browser add crosswalk? Does it use more later versions of X-walk?

I am specifically interested in adding support for client certificates and I believe later version of cross walk support it.