I certainly don't care to start the urinary olympics and to be honest, I have ridden a 09 M1000 exactly once, so I'm no expert for sure.
I rode the 09 M1000 at the same time I rode a 09 M8. I was coming off a RX-1 so I was looking for a light and flickable sled with plenty of power, and to me the M8 was it.
I know there is only a 30 lb difference in the weight of the sleds but, it felt to me like all 30 of those pounds were residing on the front bumper of the M1000
I was riding the sleds up and down the same hills and when I'd turn around at the bottom of a hill and nail the throttle, the sled would snap to attention and the nose of the M8 would jump into the air and become as light as a feather dancing up the hill where I wanted it based on slight changes in body english.
The M1000 may not have been set up as well but, it seemed to spin a bit more when I'd nail it at the bottom of the hill and the front end didn't jump in the air like the M8. It seemed to be building torque like a diesel vs. the snappy small block V8 feel of the M8. Now as you know, once a diesel gets into it's powerband nothing will stop it but, it's just not as fun to zip around on as the small block feel of the M8.
We even drag raced both 09 Sno Pros up the mountain. The M8 jumped the M1000 out of the hole but, the M1000 caught it in a couple hundered yards. The hill was too short to figure out what would happen next but, I suspect the M1000 would blow on by the M8 once it gets its legs under it but, for short pulls up reasonable sized hills, I think the M8 just might be a more fun choice, at least it was for me.