Having just picked up my first 2 Motiv balls recently, I can say that they're impressive.  In my case, the Covert Revolt gives me that ball which rolls heavy in back while giving me nice control on medium-heavy patterns.  The Sigma Sting for a pearl cover really surprised me at how good of a benchmark ball it is.  That ball reminds me more of my Storm Hy-Road in versatility, except it's cleaner up front, reads the mids well, and is slightly stronger on the back.  It's also a better version of their original Sigma as it has an improved cover.

Now, I have not thrown DV8 but there are people in my league that do.  From what I've seen, DV8 tends to be more skid/flip compared to being more of a heavy roll type of ball that Brunswick had been known for a long time.  But, now that DV8 has more balls available compared to a few years ago, they have become more versatile and you can build an arsenal that covers a variety of reaction shapes.

My opnion is that currently Motiv overall seems to have more of the bases covered in terms of reaction shape and core dynamics.  If you want true skid/flip, a combo of length and backend, or something that rolls early, it could be easier to build an arsenal from them.   However, both brands make good equipment and I think you would do well either way. 

Thanks for the input.
 I added a Hyper Cell. a Venom Shock and an Ascent today. I'm pretty happy with the reactions I got out of all of them.
More hook out of the Venom(box finish 4000) than I thought I would get. Only about 2 and 1 less than the Hyper Cell on the house shot(Kegal white pattern I think). I was able to move in with the Venom and the hyper cell. The venom got over under  when the center carried down. I was able to go deeper with the hyper(pin under ring finger) or out 8 and 3 with the Ascent and have a nice reaction with both and still have a lot of hit on the pin deck.
For as straight as it goes the Ascent has a lot of hit.

It's nice having some new toys.