Is there a Best Device for Tasker?

I am about to make the switch from ios to android for the first time since 2009 because I finally decided to do some research on what each OS is capable of. Recently, I have become absolutely fascinated with both automation and voice control in all aspects of my life. I am aware that all android devices can be 'awoken' by using Open Mic +, but I have yet to find a clear answer on how that affects battery life other than not good haha. Would the Moto X 2nd Generation (compared to the HTC One M8 or GS5) be my best bet if I am looking to get the most out of a voice controlled, tasked out device.

Thank you,
This is my first post so my apologies if it is in the wrong place.