I have both. I use Instagram more. I love just looking through great images and there is not a ton of interaction. I need that occasionally 
I also go to Twitter if I need to find something out quickly or to get a laugh on the latest debacle in whatever genre. Folks are pretty dang funny over there. However I can’t go too often because it’s saturated in Politics. And it just gets too much. Regardless of where your leanings go toward … no one, from any side, shuts up … ever. But, as I said if I need something specific, it’s great 