You really must listen to them. These guys are on opposite ends of the spectrum. MAC is a powerhouse in midrange and bass, with little detail, benchmark heavy detail.
Both brands have lots of fans and are well respected. While I love the meters and look of Mac (typically women hate the look… not just dislike) the sound… twenty seconds of listening and it gets crossed off my list. Same with Benchmark, for the opposite reason. So, for me, neither.
But I think if you are contemplating both at once… I would find a way to listen to them.