Why?
In my mind they serve pretty different functions. One is a handheld, the other is not. One is two track, the other 4. One has phantom, the other doesn't. In choosing what recorder to buy size is obviously a factor, but the functions of these two put them in entirely different camps for me. Just for interest's sake I'm curious, but personally think the vastly different functionality of the two would be more to consider than the size.
M10 to a DR-2d would be a much more appropriate comparison to me.