So you like subtleties, yes? Let's have a listen to the ever-so-slight differences in the voice of the newest version of Android's Google Search compared to Lollipop. What we've got here is a set of phones, one a Samsung Galaxy S6 running Android 5.1.1 Lollipop. The other device is a Samsung Galaxy S7 running Android 6.0.1 Marshmallow. The voice may very well have become just a TINY bit more natural. Certainly slightly different.