Read it twice, not a single differentiator between the two products was named.

If he were to acknowledge the main differentiation he would lose a lot of Android users. Hangouts, will be integrated in all 4.4+ devices providing a huge direct market for Google. In just one service announcement, Google has successfully outsourced their support department.

It's a pretty dry post, it sounds like the author wants to talk to Google to see if they can "work together"

agree! it seems that he is just "running-to-dont-loose-the-company"

yeah. Seemed vague to me.