This is awesome. Great work! Clean UI, easy to use and good analysis with versus. As it is now, it would be cool if you could compare multiple players instead of just 2, but I don't know what you are planning for the future regarding the versus function.
Similar to what tp was used for back in the day, this is nice to see where I am falling short and where others similar in skill to me are excelling and I am not.
I'm looking forward to your guys' take on rhythmic accuracy and memory. I remember the thread about it from a while back, and the discussion put forward some interesting concepts, suggesting not only is it possible, but it could eventually be quite an accurate metric. It just takes a lot of analysis before coming up with a rather simple set of conditions/rules... as you are doing! Keep it up!