I really struggled with the choice between the DT2 and the N6P myself. I've always been on Verizon, which has worked well for me as a frequent traveler, so I've stayed tied to phones that are available for their network, starting with the Palm Pre as my first smartphone then the Thunderbolt, then the Droid RAZR Maxx HD, followed by the Droid Maxx, then after that I was faced with the choice between the Droid Turbo 2, the Nexus 5X, and the N6P. I've often wondered if I would have been an iPhone user all along if the iPhone hadn't been exclusive to AT&T for so many years before it became available on Verizon.
I really, really liked the Droid Maxx. If it had received regular updates, or even if it had at least been updated to Lollipop, I might still be using it, though my unit had developed a random restart issue that for the life of me I couldn't seem to fix. I guess I was holding out hope that an update to Lollipop might solve it, but the promised update just never came (and it's now been officially killed). Having never had a Nexus phone, I had almost gotten used to NEVER having the latest OS. But being the tech geek that I am I was constantly checking forums to see when/if an update might come. This is all a way of emphasizing that this constant pining for the latest OS was starting to feel ridiculous when my wife's iPhone was always updated right away along with my father-in-law's Nexus 6.
So, I started considering new phones last fall just as a lot of great options were coming out. I vacillated for months between the DT2, the N5X, and the N6P. Mainly the choice was between another Droid or the Nexus 6P because to me the N6P ultimately became kind of a no-brainer between the two Nexus options. I hated to give up wireless charging, especially. That one thing made me put off the decision more than anything else. But I also hated the idea of getting another Droid and immediately starting that cycle of pining after the latest OS knowing that even when/if it came it would be only weeks before yet another new version of Android would be released, and that version would probably never be available on my new phone.
Then there's the security stuff on top of the OS updates. The reality is that most important Android updates now come through apps in the Play Store and updates to Google Play Services. This is often overlooked. The OS changes themselves are mostly cosmetic. This is a major difference between Android and iOS. There aren't many (any?) Android apps that don't continue to run just fine when you're one or two or even three Android versions behind, unlike iOS where eventually an older iPhone or iPad just becomes useless because the apps stop getting updates and many apps you can't download at all. But now we have to worry about security updates, or at least we're told that we have to worry about security updates. The Droid phones will probably never receive one. single. security update.
So, I bought myself a Nexus 6P, which I had read worked just fine on the Verizon network, and because my Maxx had a nano sim, all I had to do was order the phone, take the sim out of one phone and insert into the other, and I was off and running. It was even easier than I imagined it would be because now Android phones somehow see each other (I guess it must be NFC), and the settings just automatically transfer over to the new phone. I haven't had a single problem with my N6P, which has received one Marshmallow update since I've had it plus three monthly security updates, with the next coming in just a week or two. With the reversible and easy to plug in USB-C charger (just like Lightning connector on iPhones), I haven't missed wireless charging nearly as much as I thought I would.
I also have to agree with the an earlier poster that the N6P just looks more elegant than the DT2., and I have to admit that the design and overall look of the N6P made a difference for me as well. I think the N6P and the iPhone 6s Plus are almost two sides of the same coin, which is probably what Google and Huawei were aiming for. Not everyone likes that or even gives a hoot, but it did matter to me.
That's my story. I'm still kind of a recovering Droid owner, and I do miss the better implementation of active display that Motorola offers. Nexus 6p has its own active display, but it's very inconsistent. I'm hoping that this gets better in later versions of Android, which of course now I can count on receiving for at least the next couple of years!