Facebook and messenger emoticons are not the same, it is easy to understand. The emoji that can be posted on the facebook post does not contain the messenger. Do not set emoji set aside in messenger. With facebook emoji must express the message.
Earlier, Massenger's own emoji was unveiled in June 2016. However, it is not known exactly why emoji is being removed from Facebook Messenger.
Those messengers who use desktop and Android phones can only use Facebook emoji. And Apple products users can use their own iOS emoji on their device.