I'm not sure how much help I can be. I have had about 5-10 minutes on a Timbersled. My kit is a 2016 xc scout 120 with the fox reservoir shock and narrow 8"? ski on a 2011 crf450r. I had to fab a fit kit myself as I've been waiting over a month for the factory upgrade kit which as it turns out put my suspension 4" too tall @ pegs. (I know they are catching up on the 2017 orders and are trying to make the 2016 guys whole on the lessons learned from these kits. So, I'll wait for factory kit before I ride again.)
I think this is commonly known... the 2016 8" ski lacks float. Extremely noticeable in ditch crossings.
This kit has varied personalities.
light and nimble in good 1 1/2 to 2 1/2"' of powder.
Tree wells... no problem. Pop right out the other side unless a branch grabs you.
Climbs much better than expected. On one occasion I had powder coming over the front fender as I was pointing straight up the hill in 2nd. I pulled out of it into a sidehill no problem. looped around again pointed straight up a few feet over, bogged some but kept climbing in third right over the top
Tippy when parked. Due to my too tall homade fit kit I couldn't come close to touching my feet and It lacks the rigid self balancing of the Timbersled. Therefore 50% of stops ended up with a slow sideways flop. Parking on a slope definitely helped this situation.
I didn't ride on groomed but on the trail it tracks well when following a single rut from a sled. You could follow the rut and pop out of it in to the fresh with no effort.
On the way back it was pretty twitchy on mashed down trail. This was due to the track twisting slightly each time it encountered a new groove. It wasn't scary but it required constant input from the front ski to stabilize the twitch in the track. I was tired from the ride already and knowing I couldn't effectively stomp my foot due to the height, this requirement for extra input did slow me down on the way back.
I expect my experiences to just improve when I receive the proper fit kit and parts. I'll post back when I do. I may get the newer ski sooner rather than later.