I got a Huawei Watch 1 week ago and have worn/used it every day. It's the base model (silver body, black leather band). $349 at Best Buy. $371 with tax.
I got a 46mm Moto 360 (2015) which I received today. I ordered it via Moto Maker so I could get black body, black knurled bezel, and black leather band. I've been wearing it for about 4 hours now. $369 from the Moto Maker website. $390 with tax. No shipping.
So far:
I like the bigger size of the M. It does make it a little easier to read (for me, who often has to wear reading glasses).
I showed them both to a 30-ish year old woman that works in my office and asked her opinion on which one I should keep. Obviously, that was just based on looks. She picked the Moto without hesitation.
I also like the looks of the Moto better. The all black with the knurled bezel looks classy in an understated way. The H is a really nice looking watch (to me, of course). I just like the M a little bit better.
I like the lower profile, knurled bezel of the Moto better than the H, which sticks up a bit.
I like the leather band on the M better. It's a little thicker and has a more sturdy feel. And it's 22mm, where the H is 18mm wide (I think).
The ambient mode screen on the H is slightly brighter, when both are set to Brightness of 4. With the M set to "Auto" brightness (which the H does not have), in my office the H is noticeably brighter. I think the advantage here actually goes to the M and the fact that it has an Ambient Light Sensor. My H is pretty bright at night, even in Ambient mode. I feel obligated to put the H in Theater mode when actually at a movie, so as not to be distracting. I think the M would be okay to be left on while in a movie.
The screen (non-Ambient mode) on the H does look a little nicer/brighter, I think. And I DEFINITELY prefer the "no flat tire" look. But, functionality (like being able to read it more easily and using a wireless charger) are more important to me. I think the screen on the M is definitely good enough (for me).
I just plopped the M down on the generic Qi charger I have on my desk for when my phone gets low and it started right up charging. I don't want to have to spend more money to buy additional chargers for the H watch, just so I have one at work or in my truck for "just in case" days. I am pretty committed to Qi for all my devices that can possibly use it.
When I lay them both upside down on my desk and lay a straight edge across the back of both the M is just slightly thinner. I like that, too. If the H didn't have the bezel sticking up, though, it would be the thinner of the two.
Those are just my first impressions. I'm going to live with the M until around the end of the week before I make the final decision on which one to keep and which one to return. Of course, battery life is somewhat important. After the first day, the H has been consistently going all day (with everything, including WiFi, turned on) and still having around 40% battery life left by bedtime. The M needs to do at least close to that. Hopefully, with it's 33% larger battery it will actually exceed that, but the LCD screen may prove to put the kaibosh on that notion. We'll see.