The DNA is a Verizon version of the Butterfly, but with no SD card slot. Compared with what we expect of the M7 it has a slightly larger display (5"), same resolution, less storage, slightly smaller battery, and without the fancy camera tech the M7 may turn out to have. But if you're not on Verizon it doesn't matter
BTW the last couple of days' rumours are that the M7 will become the One <insert obligatory Highlander or Matrix joke here>.
Looks like suspicions that the render was the real design may be true: http://phandroid.com/?p=116377
The statement about 32GB and 64GB variants is most interesting to me, since (a) this is the first time I've heard anything other than 32GB mentioned, and (b) it's a departure from last year's "one model = one capacity" approach.