It has a different use. If I'm posting links or stuff, it'll go on Twitter. If it's random insights, it might go on both. If it's real life, usually on Snapchat since a lot of people who follow me on Twitter don't care about my day to day activities, moving house, etc. Snapchat is for a closer, more personally involved audience. I unfollow people on Twitter who constantly post personal crap there but expect and enjoy it on Snapchat.