Composit tracks?

[Norse]

Any opinions on the Composit mountain tracks M66/M67 or M770?
I need something as durable as the PowerClaw 3", and preferably 3" lugs.

 

[G.I. Joe]

I've been wondering about the composite tracks. I wonder how hard they are and how long they last

 

[Norse]

They say these tracks are durable on hard snow and won't trench in deep snow. I have no idea what the difference is between 2 and 4 rows when it comes to deep snow.
My Powerclaw (1 row) had 1 lug going halfway across the track every 3", meaning 6" between every lug. It could take me anywhere but I wonder how the 2 or 4 rows compare to that. I'm guessing they will trench more?

 

[G.I. Joe]

I'm worried about it being too hard and not getting any lift out of it

 

[Norse]

Yeah too hard mixture will make it trench. What do you think about the space between lugs?