9 months ago or so I traded in my m80ti for the m80 v4's. It wasn't a significant difference but there was a subtle and noticeable improvement. the v4's are a little smoother sounding without losing any of their detail. Sometimes I found the m80ti more sibilant on some tracks. My honest opinion is try them out and see if the difference matters to you. You can always return them and just pay the shipping costs.