Xbox One. Friends App vs PS4. PlayStation App. PS4 Wins.Sorry. Xbox One reputation system.
Microsoft demonstrates Xbox One Friends app with Twitter-like followers and feeds
http://www.theverge.com/2013/10/14/4836740/xbox-one-friends-app-followers-feeds-like-twitter
New Video Shows Xbox One Multiplayer Features: Reputation System, Community Challenges and More
http://www.dualshockers.com/2013/10/14/new-video-shows-xbox-one-multiplayer-features-reputation-system-community-challenges-and-more/
Xbox One's Friends App Walkthrough
http://www.ign.com/articles/2013/10/14/xbox-ones-friends-app-walkthrough
IGN Rewind Theater : PS4 User Interface
http://www.youtube.com/watch?v=hz_J0cHfQ_0
PlayStation App Detailed, Launches With PS4
http://www.cinemablend.com/games/PlayStation-App-Detailed-Launches-With-PS4-59639.html
PS4 Devs Explain PS4 UI Details; Usernames, PS Button Functions and More
http://www.playstationlifestyle.net/2013/09/27/ps4-devs-explain-ps4-ui-details-usernames-ps-button-functions-and-more/